[INFO] fetching crate slog-html 0.1.3...
[INFO] testing slog-html-0.1.3 against beta-2021-08-01 for beta-1.55-1
[INFO] extracting crate slog-html 0.1.3 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate slog-html 0.1.3 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate slog-html 0.1.3
[INFO] finished tweaking crates.io crate slog-html 0.1.3
[INFO] tweaked toml for crates.io crate slog-html 0.1.3 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f994b07d27c5950c3897b7903534f26cc3aef2a74ae532a24c6ce09df86aabfe
[INFO] running `Command { std: "docker" "start" "-a" "f994b07d27c5950c3897b7903534f26cc3aef2a74ae532a24c6ce09df86aabfe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f994b07d27c5950c3897b7903534f26cc3aef2a74ae532a24c6ce09df86aabfe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f994b07d27c5950c3897b7903534f26cc3aef2a74ae532a24c6ce09df86aabfe", kill_on_drop: false }`
[INFO] [stdout] f994b07d27c5950c3897b7903534f26cc3aef2a74ae532a24c6ce09df86aabfe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d75c315c7a0278d6d9714c4f9287e19f8974484d96a480b8f425af8c3e11a623
[INFO] running `Command { std: "docker" "start" "-a" "d75c315c7a0278d6d9714c4f9287e19f8974484d96a480b8f425af8c3e11a623", kill_on_drop: false }`
[INFO] [stderr]    Compiling slog v1.7.1
[INFO] [stderr]    Compiling num v0.1.42
[INFO] [stderr]    Compiling chrono v0.2.25
[INFO] [stderr]    Compiling slog-extra v0.1.2
[INFO] [stderr]    Compiling slog-stream v1.2.1
[INFO] [stderr]    Compiling slog-html v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]   --> src/lib.rs:84:1
[INFO] [stdout]    |
[INFO] [stdout] 84 | #[macro_use]
[INFO] [stdout]    | ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/decorator.rs:41:17
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn fmt(io: &mut io::Write,
[INFO] [stdout]    |                 ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/decorator.rs:42:12
[INFO] [stdout]    |
[INFO] [stdout] 42 |        f: &Fn(&mut io::Write) -> io::Result<()>,
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut io::Write) -> io::Result<()>`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/decorator.rs:42:20
[INFO] [stdout]    |
[INFO] [stdout] 42 |        f: &Fn(&mut io::Write) -> io::Result<()>,
[INFO] [stdout]    |                    ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:46:9
[INFO] [stdout]    |
[INFO] [stdout] 46 |         try!(write!(io, "<span style=\""));
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |         try!(write!(io, "\">"));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:60:9
[INFO] [stdout]    |
[INFO] [stdout] 60 |         try!(f(io));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:61:9
[INFO] [stdout]    |
[INFO] [stdout] 61 |         try!(write!(io, "</span>"));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:48:13
[INFO] [stdout]    |
[INFO] [stdout] 48 |             try!(write!(io, "color:#{};", color));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:51:13
[INFO] [stdout]    |
[INFO] [stdout] 51 |             try!(write!(io, "font-weight:bold;"));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:54:13
[INFO] [stdout]    |
[INFO] [stdout] 54 |             try!(write!(io, "font-style:italic;"));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:57:13
[INFO] [stdout]    |
[INFO] [stdout] 57 |             try!(write!(io, "{}", custom));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |         try!(f(io));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:73:9
[INFO] [stdout]    |
[INFO] [stdout] 73 |         try!(write!(io, "<span style=\""));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:88:9
[INFO] [stdout]    |
[INFO] [stdout] 88 |         try!(write!(io, "\">"));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:89:9
[INFO] [stdout]    |
[INFO] [stdout] 89 |         try!(f(io));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:90:9
[INFO] [stdout]    |
[INFO] [stdout] 90 |         try!(write!(io, "</span>"));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/decorator.rs:70:27
[INFO] [stdout]    |
[INFO] [stdout] 70 |                  io: &mut io::Write,
[INFO] [stdout]    |                           ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/decorator.rs:71:22
[INFO] [stdout]    |
[INFO] [stdout] 71 |                  f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut io::Write) -> io::Result<()>`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/decorator.rs:71:30
[INFO] [stdout]    |
[INFO] [stdout] 71 |                  f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stdout]    |                              ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:75:13
[INFO] [stdout]    |
[INFO] [stdout] 75 |             try!(write!(io, "color:#{};", color));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:77:13
[INFO] [stdout]    |
[INFO] [stdout] 77 |             try!(write!(io, "color:#{};", self.level_color));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:80:13
[INFO] [stdout]    |
[INFO] [stdout] 80 |             try!(write!(io, "font-weight:bold;"));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:83:13
[INFO] [stdout]    |
[INFO] [stdout] 83 |             try!(write!(io, "font-style:italic;"));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:86:13
[INFO] [stdout]    |
[INFO] [stdout] 86 |             try!(write!(io, "{}", custom));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/decorator.rs:95:25
[INFO] [stdout]    |
[INFO] [stdout] 95 |                io: &mut io::Write,
[INFO] [stdout]    |                         ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/decorator.rs:96:20
[INFO] [stdout]    |
[INFO] [stdout] 96 |                f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut io::Write) -> io::Result<()>`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/decorator.rs:96:28
[INFO] [stdout]    |
[INFO] [stdout] 96 |                f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stdout]    |                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/decorator.rs:102:25
[INFO] [stdout]     |
[INFO] [stdout] 102 |                io: &mut io::Write,
[INFO] [stdout]     |                         ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/decorator.rs:103:20
[INFO] [stdout]     |
[INFO] [stdout] 103 |                f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut io::Write) -> io::Result<()>`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/decorator.rs:103:28
[INFO] [stdout]     |
[INFO] [stdout] 103 |                f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stdout]     |                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/decorator.rs:109:25
[INFO] [stdout]     |
[INFO] [stdout] 109 |                io: &mut io::Write,
[INFO] [stdout]     |                         ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/decorator.rs:110:20
[INFO] [stdout]     |
[INFO] [stdout] 110 |                f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut io::Write) -> io::Result<()>`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/decorator.rs:110:28
[INFO] [stdout]     |
[INFO] [stdout] 110 |                f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stdout]     |                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/decorator.rs:116:25
[INFO] [stdout]     |
[INFO] [stdout] 116 |                io: &mut io::Write,
[INFO] [stdout]     |                         ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/decorator.rs:117:20
[INFO] [stdout]     |
[INFO] [stdout] 117 |                f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut io::Write) -> io::Result<()>`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/decorator.rs:117:28
[INFO] [stdout]     |
[INFO] [stdout] 117 |                f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stdout]     |                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/decorator.rs:123:25
[INFO] [stdout]     |
[INFO] [stdout] 123 |                io: &mut io::Write,
[INFO] [stdout]     |                         ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/decorator.rs:124:20
[INFO] [stdout]     |
[INFO] [stdout] 124 |                f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut io::Write) -> io::Result<()>`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/decorator.rs:124:28
[INFO] [stdout]     |
[INFO] [stdout] 124 |                f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stdout]     |                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |         try!(self.decorator.fmt_separator(&mut self.io, &|io: &mut io::Write| write!(io, ", ")));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:20:68
[INFO] [stdout]    |
[INFO] [stdout] 20 |         try!(self.decorator.fmt_separator(&mut self.io, &|io: &mut io::Write| write!(io, ", ")));
[INFO] [stdout]    |                                                                    ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 39 |         s!(self, key, "None");
[INFO] [stdout]    |         ---------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 39 |         s!(self, key, "None");
[INFO] [stdout]    |         ---------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 39 |         s!(self, key, "None");
[INFO] [stdout]    |         ---------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:31:58
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 39 |         s!(self, key, "None");
[INFO] [stdout]    |         ---------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:32:64
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 39 |         s!(self, key, "None");
[INFO] [stdout]    |         ---------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:33:60
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 39 |         s!(self, key, "None");
[INFO] [stdout]    |         ---------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 44 |         s!(self, key, "()");
[INFO] [stdout]    |         -------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 44 |         s!(self, key, "()");
[INFO] [stdout]    |         -------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 44 |         s!(self, key, "()");
[INFO] [stdout]    |         -------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:31:58
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 44 |         s!(self, key, "()");
[INFO] [stdout]    |         -------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:32:64
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 44 |         s!(self, key, "()");
[INFO] [stdout]    |         -------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:33:60
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 44 |         s!(self, key, "()");
[INFO] [stdout]    |         -------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 49 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 49 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 49 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:31:58
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 49 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:32:64
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 49 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:33:60
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 49 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 54 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 54 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 54 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:31:58
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 54 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:32:64
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 54 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:33:60
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 54 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 59 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 59 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 59 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:31:58
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 59 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:32:64
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 59 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:33:60
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 59 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 64 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 64 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 64 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:31:58
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 64 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:32:64
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 64 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:33:60
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 64 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 69 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 69 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 69 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:31:58
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 69 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:32:64
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 69 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:33:60
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 69 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 74 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 74 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 74 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:31:58
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 74 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:32:64
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 74 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:33:60
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 74 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 79 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 79 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 79 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:31:58
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 79 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:32:64
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 79 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:33:60
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 79 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 84 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 84 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 84 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:31:58
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 84 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:32:64
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 84 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:33:60
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 84 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 89 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 89 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 89 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:31:58
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 89 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:32:64
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 89 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:33:60
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 89 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 94 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 94 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 94 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:31:58
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 94 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:32:64
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 94 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:33:60
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 94 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 99 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 99 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 99 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:31:58
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 99 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:32:64
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 99 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:33:60
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 99 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/serializer.rs:31:9
[INFO] [stdout]     |
[INFO] [stdout] 31  |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 104 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/serializer.rs:32:9
[INFO] [stdout]     |
[INFO] [stdout] 32  |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 104 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/serializer.rs:33:9
[INFO] [stdout]     |
[INFO] [stdout] 33  |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 104 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/serializer.rs:31:58
[INFO] [stdout]     |
[INFO] [stdout] 31  |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]     |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 104 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/serializer.rs:32:64
[INFO] [stdout]     |
[INFO] [stdout] 32  |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]     |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 104 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/serializer.rs:33:60
[INFO] [stdout]     |
[INFO] [stdout] 33  |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]     |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 104 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/serializer.rs:31:9
[INFO] [stdout]     |
[INFO] [stdout] 31  |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 109 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/serializer.rs:32:9
[INFO] [stdout]     |
[INFO] [stdout] 32  |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 109 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/serializer.rs:33:9
[INFO] [stdout]     |
[INFO] [stdout] 33  |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 109 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/serializer.rs:31:58
[INFO] [stdout]     |
[INFO] [stdout] 31  |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]     |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 109 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/serializer.rs:32:64
[INFO] [stdout]     |
[INFO] [stdout] 32  |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]     |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 109 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/serializer.rs:33:60
[INFO] [stdout]     |
[INFO] [stdout] 33  |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]     |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 109 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/serializer.rs:31:9
[INFO] [stdout]     |
[INFO] [stdout] 31  |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 114 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/serializer.rs:32:9
[INFO] [stdout]     |
[INFO] [stdout] 32  |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 114 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/serializer.rs:33:9
[INFO] [stdout]     |
[INFO] [stdout] 33  |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 114 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/serializer.rs:31:58
[INFO] [stdout]     |
[INFO] [stdout] 31  |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]     |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 114 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/serializer.rs:32:64
[INFO] [stdout]     |
[INFO] [stdout] 32  |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]     |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 114 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/serializer.rs:33:60
[INFO] [stdout]     |
[INFO] [stdout] 33  |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]     |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 114 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/serializer.rs:31:9
[INFO] [stdout]     |
[INFO] [stdout] 31  |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 119 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/serializer.rs:32:9
[INFO] [stdout]     |
[INFO] [stdout] 32  |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 119 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/serializer.rs:33:9
[INFO] [stdout]     |
[INFO] [stdout] 33  |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 119 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/serializer.rs:31:58
[INFO] [stdout]     |
[INFO] [stdout] 31  |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]     |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 119 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/serializer.rs:32:64
[INFO] [stdout]     |
[INFO] [stdout] 32  |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]     |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 119 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/serializer.rs:33:60
[INFO] [stdout]     |
[INFO] [stdout] 33  |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]     |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 119 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/serializer.rs:31:9
[INFO] [stdout]     |
[INFO] [stdout] 31  |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 124 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/serializer.rs:32:9
[INFO] [stdout]     |
[INFO] [stdout] 32  |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 124 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/serializer.rs:33:9
[INFO] [stdout]     |
[INFO] [stdout] 33  |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 124 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/serializer.rs:31:58
[INFO] [stdout]     |
[INFO] [stdout] 31  |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]     |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 124 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/serializer.rs:32:64
[INFO] [stdout]     |
[INFO] [stdout] 32  |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]     |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 124 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/serializer.rs:33:60
[INFO] [stdout]     |
[INFO] [stdout] 33  |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]     |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 124 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:142:9
[INFO] [stdout]     |
[INFO] [stdout] 142 |         try!(io.write_all(b"<pre style=\"margin-bottom:-0.5em\">"));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:144:9
[INFO] [stdout]     |
[INFO] [stdout] 144 |         try!(r_decorator.fmt_timestamp(io, &*self.fn_timestamp));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:145:9
[INFO] [stdout]     |
[INFO] [stdout] 145 |         try!(r_decorator.fmt_level(io, &|io| write!(io, " {} ", record.level().as_short_str())));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:146:9
[INFO] [stdout]     |
[INFO] [stdout] 146 |         try!(r_decorator.fmt_msg(io, &|io| write!(io, "{}", record.msg())));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:135:29
[INFO] [stdout]     |
[INFO] [stdout] 135 |                    io: &mut io::Write,
[INFO] [stdout]     |                             ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:151:13
[INFO] [stdout]     |
[INFO] [stdout] 151 |             try!(serializer.print_comma());
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:152:13
[INFO] [stdout]     |
[INFO] [stdout] 152 |             try!(v.serialize(record, k, &mut serializer));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:156:13
[INFO] [stdout]     |
[INFO] [stdout] 156 |             try!(serializer.print_comma());
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:157:13
[INFO] [stdout]     |
[INFO] [stdout] 157 |             try!(v.serialize(record, k, &mut serializer));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:195:9
[INFO] [stdout]     |
[INFO] [stdout] 195 |         try!(io.write_all(b"<pre style=\"margin-bottom:-0.5em\">"));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:197:9
[INFO] [stdout]     |
[INFO] [stdout] 197 |         try!(self.print_indent(io, indent));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:198:9
[INFO] [stdout]     |
[INFO] [stdout] 198 |         try!(r_decorator.fmt_timestamp(io, &*self.fn_timestamp));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:199:9
[INFO] [stdout]     |
[INFO] [stdout] 199 |         try!(r_decorator.fmt_level(io, &|io| write!(io, " {} ", record.level().as_short_str())));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:200:9
[INFO] [stdout]     |
[INFO] [stdout] 200 |         try!(r_decorator.fmt_msg(io, &|io| write!(io, "{}", record.msg())));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:166:32
[INFO] [stdout]     |
[INFO] [stdout] 166 |                       io: &mut io::Write,
[INFO] [stdout]     |                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:172:38
[INFO] [stdout]     |
[INFO] [stdout] 172 |         let mut record_value_stack = try!(self.record_value_stack(record, logger_values));
[INFO] [stdout]     |                                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:183:17
[INFO] [stdout]     |
[INFO] [stdout] 183 |                 try!(io.write_all(b"<pre style=\"margin-bottom:-0.5em\">"));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:184:17
[INFO] [stdout]     |
[INFO] [stdout] 184 |                 try!(self.print_indent(io, i));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:185:17
[INFO] [stdout]     |
[INFO] [stdout] 185 |                 try!(io.write_all(&record_value_stack[i]));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:186:17
[INFO] [stdout]     |
[INFO] [stdout] 186 |                 try!(io.write_all(b"</pre>\n"));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:205:13
[INFO] [stdout]     |
[INFO] [stdout] 205 |             try!(serializer.print_comma());
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:206:13
[INFO] [stdout]     |
[INFO] [stdout] 206 |             try!(v.serialize(record, k, &mut serializer));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:232:17
[INFO] [stdout]     |
[INFO] [stdout] 232 |                 try!(v.serialize(record, k, &mut serializer));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:230:21
[INFO] [stdout]     |
[INFO] [stdout] 230 |                     try!(serializer.print_comma());
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:247:29
[INFO] [stdout]     |
[INFO] [stdout] 247 |             let mut value = try!(self.record_value_stack(record, parent));
[INFO] [stdout]     |                             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:254:37
[INFO] [stdout]     |
[INFO] [stdout] 254 |     fn print_indent(&self, io: &mut io::Write, indent: usize) -> io::Result<()> {
[INFO] [stdout]     |                                     ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:256:13
[INFO] [stdout]     |
[INFO] [stdout] 256 |             try!(write!(io, "  "));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:264:24
[INFO] [stdout]     |
[INFO] [stdout] 264 |               io: &mut io::Write,
[INFO] [stdout]     |                        ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:276:24
[INFO] [stdout]     |
[INFO] [stdout] 276 | pub type TimestampFn = Fn(&mut io::Write) -> io::Result<()> + Send + Sync;
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut io::Write) -> io::Result<()> + Send + Sync`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:276:32
[INFO] [stdout]     |
[INFO] [stdout] 276 | pub type TimestampFn = Fn(&mut io::Write) -> io::Result<()> + Send + Sync;
[INFO] [stdout]     |                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:283:33
[INFO] [stdout]     |
[INFO] [stdout] 283 | pub fn timestamp_local(io: &mut io::Write) -> io::Result<()> {
[INFO] [stdout]     |                                 ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:290:31
[INFO] [stdout]     |
[INFO] [stdout] 290 | pub fn timestamp_utc(io: &mut io::Write) -> io::Result<()> {
[INFO] [stdout]     |                               ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:381:26
[INFO] [stdout]     |
[INFO] [stdout] 381 |         where F: Fn(&mut io::Write) -> io::Result<()> + 'static + Send + Sync
[INFO] [stdout]     |                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `slog::OwnedKeyValueList::parent`: &Option<...> is a stupid type to return. Use `get_parent` for now.
[INFO] [stdout]    --> src/lib.rs:246:54
[INFO] [stdout]     |
[INFO] [stdout] 246 |         if let Some(ref parent) = *logger_values_ref.parent() {
[INFO] [stdout]     |                                                      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:160:14
[INFO] [stdout]     |
[INFO] [stdout] 160 |         let (mut io, _) = serializer.finish();
[INFO] [stdout]     |              ----^^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:209:14
[INFO] [stdout]     |
[INFO] [stdout] 209 |         let (mut io, _) = serializer.finish();
[INFO] [stdout]     |              ----^^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 186 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.64s
[INFO] running `Command { std: "docker" "inspect" "d75c315c7a0278d6d9714c4f9287e19f8974484d96a480b8f425af8c3e11a623", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d75c315c7a0278d6d9714c4f9287e19f8974484d96a480b8f425af8c3e11a623", kill_on_drop: false }`
[INFO] [stdout] d75c315c7a0278d6d9714c4f9287e19f8974484d96a480b8f425af8c3e11a623
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e0c45bab5d03e3b9cbfa86da1c89a5d21748d6245eaa7af3b3ca54ecfb03dd00
[INFO] running `Command { std: "docker" "start" "-a" "e0c45bab5d03e3b9cbfa86da1c89a5d21748d6245eaa7af3b3ca54ecfb03dd00", kill_on_drop: false }`
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]   --> src/lib.rs:84:1
[INFO] [stdout]    |
[INFO] [stdout] 84 | #[macro_use]
[INFO] [stdout]    | ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/decorator.rs:41:17
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn fmt(io: &mut io::Write,
[INFO] [stdout]    |                 ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/decorator.rs:42:12
[INFO] [stdout]    |
[INFO] [stdout] 42 |        f: &Fn(&mut io::Write) -> io::Result<()>,
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut io::Write) -> io::Result<()>`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/decorator.rs:42:20
[INFO] [stdout]    |
[INFO] [stdout] 42 |        f: &Fn(&mut io::Write) -> io::Result<()>,
[INFO] [stdout]    |                    ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:46:9
[INFO] [stdout]    |
[INFO] [stdout] 46 |         try!(write!(io, "<span style=\""));
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |         try!(write!(io, "\">"));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:60:9
[INFO] [stdout]    |
[INFO] [stdout] 60 |         try!(f(io));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:61:9
[INFO] [stdout]    |
[INFO] [stdout] 61 |         try!(write!(io, "</span>"));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:48:13
[INFO] [stdout]    |
[INFO] [stdout] 48 |             try!(write!(io, "color:#{};", color));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:51:13
[INFO] [stdout]    |
[INFO] [stdout] 51 |             try!(write!(io, "font-weight:bold;"));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:54:13
[INFO] [stdout]    |
[INFO] [stdout] 54 |             try!(write!(io, "font-style:italic;"));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:57:13
[INFO] [stdout]    |
[INFO] [stdout] 57 |             try!(write!(io, "{}", custom));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |         try!(f(io));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:73:9
[INFO] [stdout]    |
[INFO] [stdout] 73 |         try!(write!(io, "<span style=\""));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:88:9
[INFO] [stdout]    |
[INFO] [stdout] 88 |         try!(write!(io, "\">"));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:89:9
[INFO] [stdout]    |
[INFO] [stdout] 89 |         try!(f(io));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:90:9
[INFO] [stdout]    |
[INFO] [stdout] 90 |         try!(write!(io, "</span>"));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/decorator.rs:70:27
[INFO] [stdout]    |
[INFO] [stdout] 70 |                  io: &mut io::Write,
[INFO] [stdout]    |                           ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/decorator.rs:71:22
[INFO] [stdout]    |
[INFO] [stdout] 71 |                  f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut io::Write) -> io::Result<()>`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/decorator.rs:71:30
[INFO] [stdout]    |
[INFO] [stdout] 71 |                  f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stdout]    |                              ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:75:13
[INFO] [stdout]    |
[INFO] [stdout] 75 |             try!(write!(io, "color:#{};", color));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:77:13
[INFO] [stdout]    |
[INFO] [stdout] 77 |             try!(write!(io, "color:#{};", self.level_color));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:80:13
[INFO] [stdout]    |
[INFO] [stdout] 80 |             try!(write!(io, "font-weight:bold;"));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:83:13
[INFO] [stdout]    |
[INFO] [stdout] 83 |             try!(write!(io, "font-style:italic;"));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:86:13
[INFO] [stdout]    |
[INFO] [stdout] 86 |             try!(write!(io, "{}", custom));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/decorator.rs:95:25
[INFO] [stdout]    |
[INFO] [stdout] 95 |                io: &mut io::Write,
[INFO] [stdout]    |                         ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/decorator.rs:96:20
[INFO] [stdout]    |
[INFO] [stdout] 96 |                f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut io::Write) -> io::Result<()>`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/decorator.rs:96:28
[INFO] [stdout]    |
[INFO] [stdout] 96 |                f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stdout]    |                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/decorator.rs:102:25
[INFO] [stdout]     |
[INFO] [stdout] 102 |                io: &mut io::Write,
[INFO] [stdout]     |                         ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/decorator.rs:103:20
[INFO] [stdout]     |
[INFO] [stdout] 103 |                f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut io::Write) -> io::Result<()>`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/decorator.rs:103:28
[INFO] [stdout]     |
[INFO] [stdout] 103 |                f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stdout]     |                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/decorator.rs:109:25
[INFO] [stdout]     |
[INFO] [stdout] 109 |                io: &mut io::Write,
[INFO] [stdout]     |                         ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/decorator.rs:110:20
[INFO] [stdout]     |
[INFO] [stdout] 110 |                f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut io::Write) -> io::Result<()>`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/decorator.rs:110:28
[INFO] [stdout]     |
[INFO] [stdout] 110 |                f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stdout]     |                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/decorator.rs:116:25
[INFO] [stdout]     |
[INFO] [stdout] 116 |                io: &mut io::Write,
[INFO] [stdout]     |                         ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/decorator.rs:117:20
[INFO] [stdout]     |
[INFO] [stdout] 117 |                f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut io::Write) -> io::Result<()>`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/decorator.rs:117:28
[INFO] [stdout]     |
[INFO] [stdout] 117 |                f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stdout]     |                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/decorator.rs:123:25
[INFO] [stdout]     |
[INFO] [stdout] 123 |                io: &mut io::Write,
[INFO] [stdout]     |                         ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/decorator.rs:124:20
[INFO] [stdout]     |
[INFO] [stdout] 124 |                f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut io::Write) -> io::Result<()>`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/decorator.rs:124:28
[INFO] [stdout]     |
[INFO] [stdout] 124 |                f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stdout]     |                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |         try!(self.decorator.fmt_separator(&mut self.io, &|io: &mut io::Write| write!(io, ", ")));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:20:68
[INFO] [stdout]    |
[INFO] [stdout] 20 |         try!(self.decorator.fmt_separator(&mut self.io, &|io: &mut io::Write| write!(io, ", ")));
[INFO] [stdout]    |                                                                    ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 39 |         s!(self, key, "None");
[INFO] [stdout]    |         ---------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 39 |         s!(self, key, "None");
[INFO] [stdout]    |         ---------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 39 |         s!(self, key, "None");
[INFO] [stdout]    |         ---------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:31:58
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 39 |         s!(self, key, "None");
[INFO] [stdout]    |         ---------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:32:64
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 39 |         s!(self, key, "None");
[INFO] [stdout]    |         ---------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:33:60
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 39 |         s!(self, key, "None");
[INFO] [stdout]    |         ---------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 44 |         s!(self, key, "()");
[INFO] [stdout]    |         -------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 44 |         s!(self, key, "()");
[INFO] [stdout]    |         -------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 44 |         s!(self, key, "()");
[INFO] [stdout]    |         -------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:31:58
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 44 |         s!(self, key, "()");
[INFO] [stdout]    |         -------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:32:64
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 44 |         s!(self, key, "()");
[INFO] [stdout]    |         -------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:33:60
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 44 |         s!(self, key, "()");
[INFO] [stdout]    |         -------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 49 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 49 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 49 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:31:58
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 49 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:32:64
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 49 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:33:60
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 49 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 54 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 54 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 54 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:31:58
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 54 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:32:64
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 54 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:33:60
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 54 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 59 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 59 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 59 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:31:58
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 59 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:32:64
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 59 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:33:60
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 59 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 64 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 64 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 64 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:31:58
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 64 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:32:64
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 64 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:33:60
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 64 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 69 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 69 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 69 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:31:58
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 69 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:32:64
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 69 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:33:60
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 69 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 74 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 74 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 74 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:31:58
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 74 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:32:64
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 74 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:33:60
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 74 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 79 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 79 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 79 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:31:58
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 79 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:32:64
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 79 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:33:60
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 79 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 84 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 84 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 84 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:31:58
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 84 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:32:64
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 84 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:33:60
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 84 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 89 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 89 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 89 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:31:58
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 89 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:32:64
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 89 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:33:60
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 89 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 94 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 94 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 94 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:31:58
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 94 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:32:64
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 94 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:33:60
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 94 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 99 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 99 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 99 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:31:58
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 99 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:32:64
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 99 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:33:60
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 99 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/serializer.rs:31:9
[INFO] [stdout]     |
[INFO] [stdout] 31  |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 104 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/serializer.rs:32:9
[INFO] [stdout]     |
[INFO] [stdout] 32  |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 104 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/serializer.rs:33:9
[INFO] [stdout]     |
[INFO] [stdout] 33  |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 104 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/serializer.rs:31:58
[INFO] [stdout]     |
[INFO] [stdout] 31  |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]     |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 104 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/serializer.rs:32:64
[INFO] [stdout]     |
[INFO] [stdout] 32  |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]     |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 104 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/serializer.rs:33:60
[INFO] [stdout]     |
[INFO] [stdout] 33  |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]     |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 104 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/serializer.rs:31:9
[INFO] [stdout]     |
[INFO] [stdout] 31  |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 109 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/serializer.rs:32:9
[INFO] [stdout]     |
[INFO] [stdout] 32  |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 109 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/serializer.rs:33:9
[INFO] [stdout]     |
[INFO] [stdout] 33  |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 109 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/serializer.rs:31:58
[INFO] [stdout]     |
[INFO] [stdout] 31  |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]     |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 109 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/serializer.rs:32:64
[INFO] [stdout]     |
[INFO] [stdout] 32  |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]     |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 109 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/serializer.rs:33:60
[INFO] [stdout]     |
[INFO] [stdout] 33  |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]     |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 109 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/serializer.rs:31:9
[INFO] [stdout]     |
[INFO] [stdout] 31  |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 114 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/serializer.rs:32:9
[INFO] [stdout]     |
[INFO] [stdout] 32  |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 114 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/serializer.rs:33:9
[INFO] [stdout]     |
[INFO] [stdout] 33  |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 114 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/serializer.rs:31:58
[INFO] [stdout]     |
[INFO] [stdout] 31  |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]     |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 114 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/serializer.rs:32:64
[INFO] [stdout]     |
[INFO] [stdout] 32  |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]     |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 114 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/serializer.rs:33:60
[INFO] [stdout]     |
[INFO] [stdout] 33  |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]     |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 114 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/serializer.rs:31:9
[INFO] [stdout]     |
[INFO] [stdout] 31  |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 119 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/serializer.rs:32:9
[INFO] [stdout]     |
[INFO] [stdout] 32  |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 119 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/serializer.rs:33:9
[INFO] [stdout]     |
[INFO] [stdout] 33  |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 119 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/serializer.rs:31:58
[INFO] [stdout]     |
[INFO] [stdout] 31  |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]     |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 119 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/serializer.rs:32:64
[INFO] [stdout]     |
[INFO] [stdout] 32  |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]     |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 119 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/serializer.rs:33:60
[INFO] [stdout]     |
[INFO] [stdout] 33  |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]     |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 119 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/serializer.rs:31:9
[INFO] [stdout]     |
[INFO] [stdout] 31  |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 124 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/serializer.rs:32:9
[INFO] [stdout]     |
[INFO] [stdout] 32  |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 124 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/serializer.rs:33:9
[INFO] [stdout]     |
[INFO] [stdout] 33  |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 124 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/serializer.rs:31:58
[INFO] [stdout]     |
[INFO] [stdout] 31  |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]     |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 124 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/serializer.rs:32:64
[INFO] [stdout]     |
[INFO] [stdout] 32  |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]     |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 124 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/serializer.rs:33:60
[INFO] [stdout]     |
[INFO] [stdout] 33  |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]     |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 124 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:142:9
[INFO] [stdout]     |
[INFO] [stdout] 142 |         try!(io.write_all(b"<pre style=\"margin-bottom:-0.5em\">"));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:144:9
[INFO] [stdout]     |
[INFO] [stdout] 144 |         try!(r_decorator.fmt_timestamp(io, &*self.fn_timestamp));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:145:9
[INFO] [stdout]     |
[INFO] [stdout] 145 |         try!(r_decorator.fmt_level(io, &|io| write!(io, " {} ", record.level().as_short_str())));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:146:9
[INFO] [stdout]     |
[INFO] [stdout] 146 |         try!(r_decorator.fmt_msg(io, &|io| write!(io, "{}", record.msg())));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:135:29
[INFO] [stdout]     |
[INFO] [stdout] 135 |                    io: &mut io::Write,
[INFO] [stdout]     |                             ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:151:13
[INFO] [stdout]     |
[INFO] [stdout] 151 |             try!(serializer.print_comma());
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:152:13
[INFO] [stdout]     |
[INFO] [stdout] 152 |             try!(v.serialize(record, k, &mut serializer));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:156:13
[INFO] [stdout]     |
[INFO] [stdout] 156 |             try!(serializer.print_comma());
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:157:13
[INFO] [stdout]     |
[INFO] [stdout] 157 |             try!(v.serialize(record, k, &mut serializer));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:195:9
[INFO] [stdout]     |
[INFO] [stdout] 195 |         try!(io.write_all(b"<pre style=\"margin-bottom:-0.5em\">"));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:197:9
[INFO] [stdout]     |
[INFO] [stdout] 197 |         try!(self.print_indent(io, indent));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:198:9
[INFO] [stdout]     |
[INFO] [stdout] 198 |         try!(r_decorator.fmt_timestamp(io, &*self.fn_timestamp));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:199:9
[INFO] [stdout]     |
[INFO] [stdout] 199 |         try!(r_decorator.fmt_level(io, &|io| write!(io, " {} ", record.level().as_short_str())));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:200:9
[INFO] [stdout]     |
[INFO] [stdout] 200 |         try!(r_decorator.fmt_msg(io, &|io| write!(io, "{}", record.msg())));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:166:32
[INFO] [stdout]     |
[INFO] [stdout] 166 |                       io: &mut io::Write,
[INFO] [stdout]     |                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:172:38
[INFO] [stdout]     |
[INFO] [stdout] 172 |         let mut record_value_stack = try!(self.record_value_stack(record, logger_values));
[INFO] [stdout]     |                                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:183:17
[INFO] [stdout]     |
[INFO] [stdout] 183 |                 try!(io.write_all(b"<pre style=\"margin-bottom:-0.5em\">"));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:184:17
[INFO] [stdout]     |
[INFO] [stdout] 184 |                 try!(self.print_indent(io, i));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:185:17
[INFO] [stdout]     |
[INFO] [stdout] 185 |                 try!(io.write_all(&record_value_stack[i]));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling slog-html v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:186:17
[INFO] [stdout]     |
[INFO] [stdout] 186 |                 try!(io.write_all(b"</pre>\n"));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:205:13
[INFO] [stdout]     |
[INFO] [stdout] 205 |             try!(serializer.print_comma());
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:206:13
[INFO] [stdout]     |
[INFO] [stdout] 206 |             try!(v.serialize(record, k, &mut serializer));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:232:17
[INFO] [stdout]     |
[INFO] [stdout] 232 |                 try!(v.serialize(record, k, &mut serializer));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:230:21
[INFO] [stdout]     |
[INFO] [stdout] 230 |                     try!(serializer.print_comma());
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:247:29
[INFO] [stdout]     |
[INFO] [stdout] 247 |             let mut value = try!(self.record_value_stack(record, parent));
[INFO] [stdout]     |                             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:254:37
[INFO] [stdout]     |
[INFO] [stdout] 254 |     fn print_indent(&self, io: &mut io::Write, indent: usize) -> io::Result<()> {
[INFO] [stdout]     |                                     ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:256:13
[INFO] [stdout]     |
[INFO] [stdout] 256 |             try!(write!(io, "  "));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:264:24
[INFO] [stdout]     |
[INFO] [stdout] 264 |               io: &mut io::Write,
[INFO] [stdout]     |                        ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:276:24
[INFO] [stdout]     |
[INFO] [stdout] 276 | pub type TimestampFn = Fn(&mut io::Write) -> io::Result<()> + Send + Sync;
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut io::Write) -> io::Result<()> + Send + Sync`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:276:32
[INFO] [stdout]     |
[INFO] [stdout] 276 | pub type TimestampFn = Fn(&mut io::Write) -> io::Result<()> + Send + Sync;
[INFO] [stdout]     |                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:283:33
[INFO] [stdout]     |
[INFO] [stdout] 283 | pub fn timestamp_local(io: &mut io::Write) -> io::Result<()> {
[INFO] [stdout]     |                                 ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:290:31
[INFO] [stdout]     |
[INFO] [stdout] 290 | pub fn timestamp_utc(io: &mut io::Write) -> io::Result<()> {
[INFO] [stdout]     |                               ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:381:26
[INFO] [stdout]     |
[INFO] [stdout] 381 |         where F: Fn(&mut io::Write) -> io::Result<()> + 'static + Send + Sync
[INFO] [stdout]     |                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `slog::OwnedKeyValueList::parent`: &Option<...> is a stupid type to return. Use `get_parent` for now.
[INFO] [stdout]    --> src/lib.rs:246:54
[INFO] [stdout]     |
[INFO] [stdout] 246 |         if let Some(ref parent) = *logger_values_ref.parent() {
[INFO] [stdout]     |                                                      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:160:14
[INFO] [stdout]     |
[INFO] [stdout] 160 |         let (mut io, _) = serializer.finish();
[INFO] [stdout]     |              ----^^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:209:14
[INFO] [stdout]     |
[INFO] [stdout] 209 |         let (mut io, _) = serializer.finish();
[INFO] [stdout]     |              ----^^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 186 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]   --> src/lib.rs:84:1
[INFO] [stdout]    |
[INFO] [stdout] 84 | #[macro_use]
[INFO] [stdout]    | ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/decorator.rs:41:17
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn fmt(io: &mut io::Write,
[INFO] [stdout]    |                 ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/decorator.rs:42:12
[INFO] [stdout]    |
[INFO] [stdout] 42 |        f: &Fn(&mut io::Write) -> io::Result<()>,
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut io::Write) -> io::Result<()>`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/decorator.rs:42:20
[INFO] [stdout]    |
[INFO] [stdout] 42 |        f: &Fn(&mut io::Write) -> io::Result<()>,
[INFO] [stdout]    |                    ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:46:9
[INFO] [stdout]    |
[INFO] [stdout] 46 |         try!(write!(io, "<span style=\""));
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |         try!(write!(io, "\">"));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:60:9
[INFO] [stdout]    |
[INFO] [stdout] 60 |         try!(f(io));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:61:9
[INFO] [stdout]    |
[INFO] [stdout] 61 |         try!(write!(io, "</span>"));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:48:13
[INFO] [stdout]    |
[INFO] [stdout] 48 |             try!(write!(io, "color:#{};", color));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:51:13
[INFO] [stdout]    |
[INFO] [stdout] 51 |             try!(write!(io, "font-weight:bold;"));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:54:13
[INFO] [stdout]    |
[INFO] [stdout] 54 |             try!(write!(io, "font-style:italic;"));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:57:13
[INFO] [stdout]    |
[INFO] [stdout] 57 |             try!(write!(io, "{}", custom));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |         try!(f(io));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:73:9
[INFO] [stdout]    |
[INFO] [stdout] 73 |         try!(write!(io, "<span style=\""));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:88:9
[INFO] [stdout]    |
[INFO] [stdout] 88 |         try!(write!(io, "\">"));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:89:9
[INFO] [stdout]    |
[INFO] [stdout] 89 |         try!(f(io));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:90:9
[INFO] [stdout]    |
[INFO] [stdout] 90 |         try!(write!(io, "</span>"));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/decorator.rs:70:27
[INFO] [stdout]    |
[INFO] [stdout] 70 |                  io: &mut io::Write,
[INFO] [stdout]    |                           ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/decorator.rs:71:22
[INFO] [stdout]    |
[INFO] [stdout] 71 |                  f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut io::Write) -> io::Result<()>`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/decorator.rs:71:30
[INFO] [stdout]    |
[INFO] [stdout] 71 |                  f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stdout]    |                              ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:75:13
[INFO] [stdout]    |
[INFO] [stdout] 75 |             try!(write!(io, "color:#{};", color));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:77:13
[INFO] [stdout]    |
[INFO] [stdout] 77 |             try!(write!(io, "color:#{};", self.level_color));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:80:13
[INFO] [stdout]    |
[INFO] [stdout] 80 |             try!(write!(io, "font-weight:bold;"));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:83:13
[INFO] [stdout]    |
[INFO] [stdout] 83 |             try!(write!(io, "font-style:italic;"));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/decorator.rs:86:13
[INFO] [stdout]    |
[INFO] [stdout] 86 |             try!(write!(io, "{}", custom));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/decorator.rs:95:25
[INFO] [stdout]    |
[INFO] [stdout] 95 |                io: &mut io::Write,
[INFO] [stdout]    |                         ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/decorator.rs:96:20
[INFO] [stdout]    |
[INFO] [stdout] 96 |                f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut io::Write) -> io::Result<()>`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/decorator.rs:96:28
[INFO] [stdout]    |
[INFO] [stdout] 96 |                f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stdout]    |                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/decorator.rs:102:25
[INFO] [stdout]     |
[INFO] [stdout] 102 |                io: &mut io::Write,
[INFO] [stdout]     |                         ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/decorator.rs:103:20
[INFO] [stdout]     |
[INFO] [stdout] 103 |                f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut io::Write) -> io::Result<()>`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/decorator.rs:103:28
[INFO] [stdout]     |
[INFO] [stdout] 103 |                f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stdout]     |                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/decorator.rs:109:25
[INFO] [stdout]     |
[INFO] [stdout] 109 |                io: &mut io::Write,
[INFO] [stdout]     |                         ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/decorator.rs:110:20
[INFO] [stdout]     |
[INFO] [stdout] 110 |                f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut io::Write) -> io::Result<()>`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/decorator.rs:110:28
[INFO] [stdout]     |
[INFO] [stdout] 110 |                f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stdout]     |                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/decorator.rs:116:25
[INFO] [stdout]     |
[INFO] [stdout] 116 |                io: &mut io::Write,
[INFO] [stdout]     |                         ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/decorator.rs:117:20
[INFO] [stdout]     |
[INFO] [stdout] 117 |                f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut io::Write) -> io::Result<()>`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/decorator.rs:117:28
[INFO] [stdout]     |
[INFO] [stdout] 117 |                f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stdout]     |                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/decorator.rs:123:25
[INFO] [stdout]     |
[INFO] [stdout] 123 |                io: &mut io::Write,
[INFO] [stdout]     |                         ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/decorator.rs:124:20
[INFO] [stdout]     |
[INFO] [stdout] 124 |                f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut io::Write) -> io::Result<()>`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/decorator.rs:124:28
[INFO] [stdout]     |
[INFO] [stdout] 124 |                f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stdout]     |                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |         try!(self.decorator.fmt_separator(&mut self.io, &|io: &mut io::Write| write!(io, ", ")));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:20:68
[INFO] [stdout]    |
[INFO] [stdout] 20 |         try!(self.decorator.fmt_separator(&mut self.io, &|io: &mut io::Write| write!(io, ", ")));
[INFO] [stdout]    |                                                                    ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 39 |         s!(self, key, "None");
[INFO] [stdout]    |         ---------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 39 |         s!(self, key, "None");
[INFO] [stdout]    |         ---------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 39 |         s!(self, key, "None");
[INFO] [stdout]    |         ---------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:31:58
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 39 |         s!(self, key, "None");
[INFO] [stdout]    |         ---------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:32:64
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 39 |         s!(self, key, "None");
[INFO] [stdout]    |         ---------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:33:60
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 39 |         s!(self, key, "None");
[INFO] [stdout]    |         ---------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 44 |         s!(self, key, "()");
[INFO] [stdout]    |         -------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 44 |         s!(self, key, "()");
[INFO] [stdout]    |         -------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 44 |         s!(self, key, "()");
[INFO] [stdout]    |         -------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:31:58
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 44 |         s!(self, key, "()");
[INFO] [stdout]    |         -------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:32:64
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 44 |         s!(self, key, "()");
[INFO] [stdout]    |         -------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:33:60
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 44 |         s!(self, key, "()");
[INFO] [stdout]    |         -------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 49 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 49 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 49 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:31:58
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 49 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:32:64
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 49 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:33:60
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 49 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 54 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 54 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 54 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:31:58
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 54 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:32:64
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 54 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:33:60
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 54 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 59 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 59 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 59 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:31:58
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 59 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:32:64
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 59 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:33:60
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 59 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 64 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 64 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 64 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:31:58
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 64 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:32:64
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 64 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:33:60
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 64 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 69 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 69 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 69 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:31:58
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 69 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:32:64
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 69 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:33:60
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 69 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 74 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 74 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 74 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:31:58
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 74 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:32:64
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 74 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:33:60
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 74 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 79 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 79 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 79 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:31:58
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 79 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:32:64
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 79 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:33:60
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 79 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 84 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 84 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 84 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:31:58
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 84 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:32:64
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 84 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:33:60
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 84 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 89 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 89 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 89 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:31:58
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 89 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:32:64
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 89 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:33:60
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 89 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 94 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 94 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 94 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:31:58
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 94 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:32:64
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 94 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:33:60
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 94 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 99 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 99 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/serializer.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 99 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:31:58
[INFO] [stdout]    |
[INFO] [stdout] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 99 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:32:64
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 99 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/serializer.rs:33:60
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 99 |         s!(self, key, val);
[INFO] [stdout]    |         ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/serializer.rs:31:9
[INFO] [stdout]     |
[INFO] [stdout] 31  |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 104 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/serializer.rs:32:9
[INFO] [stdout]     |
[INFO] [stdout] 32  |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 104 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/serializer.rs:33:9
[INFO] [stdout]     |
[INFO] [stdout] 33  |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 104 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/serializer.rs:31:58
[INFO] [stdout]     |
[INFO] [stdout] 31  |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]     |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 104 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/serializer.rs:32:64
[INFO] [stdout]     |
[INFO] [stdout] 32  |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]     |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 104 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/serializer.rs:33:60
[INFO] [stdout]     |
[INFO] [stdout] 33  |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]     |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 104 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/serializer.rs:31:9
[INFO] [stdout]     |
[INFO] [stdout] 31  |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 109 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/serializer.rs:32:9
[INFO] [stdout]     |
[INFO] [stdout] 32  |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 109 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/serializer.rs:33:9
[INFO] [stdout]     |
[INFO] [stdout] 33  |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 109 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/serializer.rs:31:58
[INFO] [stdout]     |
[INFO] [stdout] 31  |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]     |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 109 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/serializer.rs:32:64
[INFO] [stdout]     |
[INFO] [stdout] 32  |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]     |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 109 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/serializer.rs:33:60
[INFO] [stdout]     |
[INFO] [stdout] 33  |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]     |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 109 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/serializer.rs:31:9
[INFO] [stdout]     |
[INFO] [stdout] 31  |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 114 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/serializer.rs:32:9
[INFO] [stdout]     |
[INFO] [stdout] 32  |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 114 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/serializer.rs:33:9
[INFO] [stdout]     |
[INFO] [stdout] 33  |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 114 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/serializer.rs:31:58
[INFO] [stdout]     |
[INFO] [stdout] 31  |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]     |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 114 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/serializer.rs:32:64
[INFO] [stdout]     |
[INFO] [stdout] 32  |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]     |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 114 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/serializer.rs:33:60
[INFO] [stdout]     |
[INFO] [stdout] 33  |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]     |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 114 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/serializer.rs:31:9
[INFO] [stdout]     |
[INFO] [stdout] 31  |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 119 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/serializer.rs:32:9
[INFO] [stdout]     |
[INFO] [stdout] 32  |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 119 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/serializer.rs:33:9
[INFO] [stdout]     |
[INFO] [stdout] 33  |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 119 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/serializer.rs:31:58
[INFO] [stdout]     |
[INFO] [stdout] 31  |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]     |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 119 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/serializer.rs:32:64
[INFO] [stdout]     |
[INFO] [stdout] 32  |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]     |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 119 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/serializer.rs:33:60
[INFO] [stdout]     |
[INFO] [stdout] 33  |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]     |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 119 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/serializer.rs:31:9
[INFO] [stdout]     |
[INFO] [stdout] 31  |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 124 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/serializer.rs:32:9
[INFO] [stdout]     |
[INFO] [stdout] 32  |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 124 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/serializer.rs:33:9
[INFO] [stdout]     |
[INFO] [stdout] 33  |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 124 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/serializer.rs:31:58
[INFO] [stdout]     |
[INFO] [stdout] 31  |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stdout]     |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 124 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/serializer.rs:32:64
[INFO] [stdout]     |
[INFO] [stdout] 32  |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stdout]     |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 124 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/serializer.rs:33:60
[INFO] [stdout]     |
[INFO] [stdout] 33  |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stdout]     |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] ...
[INFO] [stdout] 124 |         s!(self, key, val);
[INFO] [stdout]     |         ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:142:9
[INFO] [stdout]     |
[INFO] [stdout] 142 |         try!(io.write_all(b"<pre style=\"margin-bottom:-0.5em\">"));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:144:9
[INFO] [stdout]     |
[INFO] [stdout] 144 |         try!(r_decorator.fmt_timestamp(io, &*self.fn_timestamp));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:145:9
[INFO] [stdout]     |
[INFO] [stdout] 145 |         try!(r_decorator.fmt_level(io, &|io| write!(io, " {} ", record.level().as_short_str())));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:146:9
[INFO] [stdout]     |
[INFO] [stdout] 146 |         try!(r_decorator.fmt_msg(io, &|io| write!(io, "{}", record.msg())));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:135:29
[INFO] [stdout]     |
[INFO] [stdout] 135 |                    io: &mut io::Write,
[INFO] [stdout]     |                             ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:151:13
[INFO] [stdout]     |
[INFO] [stdout] 151 |             try!(serializer.print_comma());
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:152:13
[INFO] [stdout]     |
[INFO] [stdout] 152 |             try!(v.serialize(record, k, &mut serializer));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:156:13
[INFO] [stdout]     |
[INFO] [stdout] 156 |             try!(serializer.print_comma());
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:157:13
[INFO] [stdout]     |
[INFO] [stdout] 157 |             try!(v.serialize(record, k, &mut serializer));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:195:9
[INFO] [stdout]     |
[INFO] [stdout] 195 |         try!(io.write_all(b"<pre style=\"margin-bottom:-0.5em\">"));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:197:9
[INFO] [stdout]     |
[INFO] [stdout] 197 |         try!(self.print_indent(io, indent));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:198:9
[INFO] [stdout]     |
[INFO] [stdout] 198 |         try!(r_decorator.fmt_timestamp(io, &*self.fn_timestamp));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:199:9
[INFO] [stdout]     |
[INFO] [stdout] 199 |         try!(r_decorator.fmt_level(io, &|io| write!(io, " {} ", record.level().as_short_str())));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:200:9
[INFO] [stdout]     |
[INFO] [stdout] 200 |         try!(r_decorator.fmt_msg(io, &|io| write!(io, "{}", record.msg())));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:166:32
[INFO] [stdout]     |
[INFO] [stdout] 166 |                       io: &mut io::Write,
[INFO] [stdout]     |                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:172:38
[INFO] [stdout]     |
[INFO] [stdout] 172 |         let mut record_value_stack = try!(self.record_value_stack(record, logger_values));
[INFO] [stdout]     |                                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:183:17
[INFO] [stdout]     |
[INFO] [stdout] 183 |                 try!(io.write_all(b"<pre style=\"margin-bottom:-0.5em\">"));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:184:17
[INFO] [stdout]     |
[INFO] [stdout] 184 |                 try!(self.print_indent(io, i));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:185:17
[INFO] [stdout]     |
[INFO] [stdout] 185 |                 try!(io.write_all(&record_value_stack[i]));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:186:17
[INFO] [stdout]     |
[INFO] [stdout] 186 |                 try!(io.write_all(b"</pre>\n"));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:205:13
[INFO] [stdout]     |
[INFO] [stdout] 205 |             try!(serializer.print_comma());
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:206:13
[INFO] [stdout]     |
[INFO] [stdout] 206 |             try!(v.serialize(record, k, &mut serializer));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:232:17
[INFO] [stdout]     |
[INFO] [stdout] 232 |                 try!(v.serialize(record, k, &mut serializer));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:230:21
[INFO] [stdout]     |
[INFO] [stdout] 230 |                     try!(serializer.print_comma());
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:247:29
[INFO] [stdout]     |
[INFO] [stdout] 247 |             let mut value = try!(self.record_value_stack(record, parent));
[INFO] [stdout]     |                             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:254:37
[INFO] [stdout]     |
[INFO] [stdout] 254 |     fn print_indent(&self, io: &mut io::Write, indent: usize) -> io::Result<()> {
[INFO] [stdout]     |                                     ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:256:13
[INFO] [stdout]     |
[INFO] [stdout] 256 |             try!(write!(io, "  "));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:264:24
[INFO] [stdout]     |
[INFO] [stdout] 264 |               io: &mut io::Write,
[INFO] [stdout]     |                        ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:276:24
[INFO] [stdout]     |
[INFO] [stdout] 276 | pub type TimestampFn = Fn(&mut io::Write) -> io::Result<()> + Send + Sync;
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut io::Write) -> io::Result<()> + Send + Sync`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:276:32
[INFO] [stdout]     |
[INFO] [stdout] 276 | pub type TimestampFn = Fn(&mut io::Write) -> io::Result<()> + Send + Sync;
[INFO] [stdout]     |                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:283:33
[INFO] [stdout]     |
[INFO] [stdout] 283 | pub fn timestamp_local(io: &mut io::Write) -> io::Result<()> {
[INFO] [stdout]     |                                 ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:290:31
[INFO] [stdout]     |
[INFO] [stdout] 290 | pub fn timestamp_utc(io: &mut io::Write) -> io::Result<()> {
[INFO] [stdout]     |                               ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:381:26
[INFO] [stdout]     |
[INFO] [stdout] 381 |         where F: Fn(&mut io::Write) -> io::Result<()> + 'static + Send + Sync
[INFO] [stdout]     |                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `slog::OwnedKeyValueList::parent`: &Option<...> is a stupid type to return. Use `get_parent` for now.
[INFO] [stdout]    --> src/lib.rs:246:54
[INFO] [stdout]     |
[INFO] [stdout] 246 |         if let Some(ref parent) = *logger_values_ref.parent() {
[INFO] [stdout]     |                                                      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:160:14
[INFO] [stdout]     |
[INFO] [stdout] 160 |         let (mut io, _) = serializer.finish();
[INFO] [stdout]     |              ----^^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:209:14
[INFO] [stdout]     |
[INFO] [stdout] 209 |         let (mut io, _) = serializer.finish();
[INFO] [stdout]     |              ----^^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 186 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.67s
[INFO] running `Command { std: "docker" "inspect" "e0c45bab5d03e3b9cbfa86da1c89a5d21748d6245eaa7af3b3ca54ecfb03dd00", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0c45bab5d03e3b9cbfa86da1c89a5d21748d6245eaa7af3b3ca54ecfb03dd00", kill_on_drop: false }`
[INFO] [stdout] e0c45bab5d03e3b9cbfa86da1c89a5d21748d6245eaa7af3b3ca54ecfb03dd00
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 53d24d5b58c9c4d21067235fa9e959ba5c54dad6cd494652d30c04bb13a8c1ba
[INFO] running `Command { std: "docker" "start" "-a" "53d24d5b58c9c4d21067235fa9e959ba5c54dad6cd494652d30c04bb13a8c1ba", kill_on_drop: false }`
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]   --> src/lib.rs:84:1
[INFO] [stderr]    |
[INFO] [stderr] 84 | #[macro_use]
[INFO] [stderr]    | ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/decorator.rs:41:17
[INFO] [stderr]    |
[INFO] [stderr] 41 | fn fmt(io: &mut io::Write,
[INFO] [stderr]    |                 ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/decorator.rs:42:12
[INFO] [stderr]    |
[INFO] [stderr] 42 |        f: &Fn(&mut io::Write) -> io::Result<()>,
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut io::Write) -> io::Result<()>`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/decorator.rs:42:20
[INFO] [stderr]    |
[INFO] [stderr] 42 |        f: &Fn(&mut io::Write) -> io::Result<()>,
[INFO] [stderr]    |                    ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/decorator.rs:46:9
[INFO] [stderr]    |
[INFO] [stderr] 46 |         try!(write!(io, "<span style=\""));
[INFO] [stderr]    |         ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/decorator.rs:59:9
[INFO] [stderr]    |
[INFO] [stderr] 59 |         try!(write!(io, "\">"));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/decorator.rs:60:9
[INFO] [stderr]    |
[INFO] [stderr] 60 |         try!(f(io));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/decorator.rs:61:9
[INFO] [stderr]    |
[INFO] [stderr] 61 |         try!(write!(io, "</span>"));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/decorator.rs:48:13
[INFO] [stderr]    |
[INFO] [stderr] 48 |             try!(write!(io, "color:#{};", color));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/decorator.rs:51:13
[INFO] [stderr]    |
[INFO] [stderr] 51 |             try!(write!(io, "font-weight:bold;"));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/decorator.rs:54:13
[INFO] [stderr]    |
[INFO] [stderr] 54 |             try!(write!(io, "font-style:italic;"));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/decorator.rs:57:13
[INFO] [stderr]    |
[INFO] [stderr] 57 |             try!(write!(io, "{}", custom));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/decorator.rs:63:9
[INFO] [stderr]    |
[INFO] [stderr] 63 |         try!(f(io));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/decorator.rs:73:9
[INFO] [stderr]    |
[INFO] [stderr] 73 |         try!(write!(io, "<span style=\""));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/decorator.rs:88:9
[INFO] [stderr]    |
[INFO] [stderr] 88 |         try!(write!(io, "\">"));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/decorator.rs:89:9
[INFO] [stderr]    |
[INFO] [stderr] 89 |         try!(f(io));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/decorator.rs:90:9
[INFO] [stderr]    |
[INFO] [stderr] 90 |         try!(write!(io, "</span>"));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/decorator.rs:70:27
[INFO] [stderr]    |
[INFO] [stderr] 70 |                  io: &mut io::Write,
[INFO] [stderr]    |                           ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/decorator.rs:71:22
[INFO] [stderr]    |
[INFO] [stderr] 71 |                  f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stderr]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut io::Write) -> io::Result<()>`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/decorator.rs:71:30
[INFO] [stderr]    |
[INFO] [stderr] 71 |                  f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stderr]    |                              ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/decorator.rs:75:13
[INFO] [stderr]    |
[INFO] [stderr] 75 |             try!(write!(io, "color:#{};", color));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/decorator.rs:77:13
[INFO] [stderr]    |
[INFO] [stderr] 77 |             try!(write!(io, "color:#{};", self.level_color));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/decorator.rs:80:13
[INFO] [stderr]    |
[INFO] [stderr] 80 |             try!(write!(io, "font-weight:bold;"));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/decorator.rs:83:13
[INFO] [stderr]    |
[INFO] [stderr] 83 |             try!(write!(io, "font-style:italic;"));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/decorator.rs:86:13
[INFO] [stderr]    |
[INFO] [stderr] 86 |             try!(write!(io, "{}", custom));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/decorator.rs:95:25
[INFO] [stderr]    |
[INFO] [stderr] 95 |                io: &mut io::Write,
[INFO] [stderr]    |                         ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/decorator.rs:96:20
[INFO] [stderr]    |
[INFO] [stderr] 96 |                f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stderr]    |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut io::Write) -> io::Result<()>`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/decorator.rs:96:28
[INFO] [stderr]    |
[INFO] [stderr] 96 |                f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stderr]    |                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/decorator.rs:102:25
[INFO] [stderr]     |
[INFO] [stderr] 102 |                io: &mut io::Write,
[INFO] [stderr]     |                         ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/decorator.rs:103:20
[INFO] [stderr]     |
[INFO] [stderr] 103 |                f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut io::Write) -> io::Result<()>`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/decorator.rs:103:28
[INFO] [stderr]     |
[INFO] [stderr] 103 |                f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stderr]     |                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/decorator.rs:109:25
[INFO] [stderr]     |
[INFO] [stderr] 109 |                io: &mut io::Write,
[INFO] [stderr]     |                         ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/decorator.rs:110:20
[INFO] [stderr]     |
[INFO] [stderr] 110 |                f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut io::Write) -> io::Result<()>`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/decorator.rs:110:28
[INFO] [stderr]     |
[INFO] [stderr] 110 |                f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stderr]     |                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/decorator.rs:116:25
[INFO] [stderr]     |
[INFO] [stderr] 116 |                io: &mut io::Write,
[INFO] [stderr]     |                         ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/decorator.rs:117:20
[INFO] [stderr]     |
[INFO] [stderr] 117 |                f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut io::Write) -> io::Result<()>`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/decorator.rs:117:28
[INFO] [stderr]     |
[INFO] [stderr] 117 |                f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stderr]     |                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/decorator.rs:123:25
[INFO] [stderr]     |
[INFO] [stderr] 123 |                io: &mut io::Write,
[INFO] [stderr]     |                         ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/decorator.rs:124:20
[INFO] [stderr]     |
[INFO] [stderr] 124 |                f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut io::Write) -> io::Result<()>`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/decorator.rs:124:28
[INFO] [stderr]     |
[INFO] [stderr] 124 |                f: &Fn(&mut io::Write) -> io::Result<()>)
[INFO] [stderr]     |                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:20:9
[INFO] [stderr]    |
[INFO] [stderr] 20 |         try!(self.decorator.fmt_separator(&mut self.io, &|io: &mut io::Write| write!(io, ", ")));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/serializer.rs:20:68
[INFO] [stderr]    |
[INFO] [stderr] 20 |         try!(self.decorator.fmt_separator(&mut self.io, &|io: &mut io::Write| write!(io, ", ")));
[INFO] [stderr]    |                                                                    ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:31:9
[INFO] [stderr]    |
[INFO] [stderr] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 39 |         s!(self, key, "None");
[INFO] [stderr]    |         ---------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:32:9
[INFO] [stderr]    |
[INFO] [stderr] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 39 |         s!(self, key, "None");
[INFO] [stderr]    |         ---------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 39 |         s!(self, key, "None");
[INFO] [stderr]    |         ---------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/serializer.rs:31:58
[INFO] [stderr]    |
[INFO] [stderr] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stderr]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 39 |         s!(self, key, "None");
[INFO] [stderr]    |         ---------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/serializer.rs:32:64
[INFO] [stderr]    |
[INFO] [stderr] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stderr]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 39 |         s!(self, key, "None");
[INFO] [stderr]    |         ---------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/serializer.rs:33:60
[INFO] [stderr]    |
[INFO] [stderr] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stderr]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 39 |         s!(self, key, "None");
[INFO] [stderr]    |         ---------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:31:9
[INFO] [stderr]    |
[INFO] [stderr] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 44 |         s!(self, key, "()");
[INFO] [stderr]    |         -------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:32:9
[INFO] [stderr]    |
[INFO] [stderr] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 44 |         s!(self, key, "()");
[INFO] [stderr]    |         -------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 44 |         s!(self, key, "()");
[INFO] [stderr]    |         -------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/serializer.rs:31:58
[INFO] [stderr]    |
[INFO] [stderr] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stderr]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 44 |         s!(self, key, "()");
[INFO] [stderr]    |         -------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/serializer.rs:32:64
[INFO] [stderr]    |
[INFO] [stderr] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stderr]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 44 |         s!(self, key, "()");
[INFO] [stderr]    |         -------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/serializer.rs:33:60
[INFO] [stderr]    |
[INFO] [stderr] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stderr]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 44 |         s!(self, key, "()");
[INFO] [stderr]    |         -------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:31:9
[INFO] [stderr]    |
[INFO] [stderr] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 49 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:32:9
[INFO] [stderr]    |
[INFO] [stderr] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 49 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 49 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/serializer.rs:31:58
[INFO] [stderr]    |
[INFO] [stderr] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stderr]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 49 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/serializer.rs:32:64
[INFO] [stderr]    |
[INFO] [stderr] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stderr]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 49 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/serializer.rs:33:60
[INFO] [stderr]    |
[INFO] [stderr] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stderr]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 49 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:31:9
[INFO] [stderr]    |
[INFO] [stderr] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 54 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:32:9
[INFO] [stderr]    |
[INFO] [stderr] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 54 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 54 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/serializer.rs:31:58
[INFO] [stderr]    |
[INFO] [stderr] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stderr]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 54 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/serializer.rs:32:64
[INFO] [stderr]    |
[INFO] [stderr] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stderr]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 54 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/serializer.rs:33:60
[INFO] [stderr]    |
[INFO] [stderr] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stderr]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 54 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:31:9
[INFO] [stderr]    |
[INFO] [stderr] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 59 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:32:9
[INFO] [stderr]    |
[INFO] [stderr] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 59 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 59 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/serializer.rs:31:58
[INFO] [stderr]    |
[INFO] [stderr] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stderr]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 59 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/serializer.rs:32:64
[INFO] [stderr]    |
[INFO] [stderr] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stderr]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 59 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/serializer.rs:33:60
[INFO] [stderr]    |
[INFO] [stderr] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stderr]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 59 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:31:9
[INFO] [stderr]    |
[INFO] [stderr] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 64 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:32:9
[INFO] [stderr]    |
[INFO] [stderr] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 64 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 64 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/serializer.rs:31:58
[INFO] [stderr]    |
[INFO] [stderr] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stderr]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 64 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/serializer.rs:32:64
[INFO] [stderr]    |
[INFO] [stderr] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stderr]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 64 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/serializer.rs:33:60
[INFO] [stderr]    |
[INFO] [stderr] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stderr]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 64 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:31:9
[INFO] [stderr]    |
[INFO] [stderr] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 69 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:32:9
[INFO] [stderr]    |
[INFO] [stderr] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 69 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 69 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/serializer.rs:31:58
[INFO] [stderr]    |
[INFO] [stderr] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stderr]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 69 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/serializer.rs:32:64
[INFO] [stderr]    |
[INFO] [stderr] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stderr]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 69 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/serializer.rs:33:60
[INFO] [stderr]    |
[INFO] [stderr] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stderr]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 69 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:31:9
[INFO] [stderr]    |
[INFO] [stderr] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 74 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:32:9
[INFO] [stderr]    |
[INFO] [stderr] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 74 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 74 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/serializer.rs:31:58
[INFO] [stderr]    |
[INFO] [stderr] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stderr]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 74 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/serializer.rs:32:64
[INFO] [stderr]    |
[INFO] [stderr] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stderr]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 74 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/serializer.rs:33:60
[INFO] [stderr]    |
[INFO] [stderr] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stderr]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 74 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:31:9
[INFO] [stderr]    |
[INFO] [stderr] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 79 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:32:9
[INFO] [stderr]    |
[INFO] [stderr] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 79 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 79 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/serializer.rs:31:58
[INFO] [stderr]    |
[INFO] [stderr] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stderr]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 79 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/serializer.rs:32:64
[INFO] [stderr]    |
[INFO] [stderr] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stderr]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 79 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/serializer.rs:33:60
[INFO] [stderr]    |
[INFO] [stderr] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stderr]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 79 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:31:9
[INFO] [stderr]    |
[INFO] [stderr] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 84 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:32:9
[INFO] [stderr]    |
[INFO] [stderr] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 84 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 84 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/serializer.rs:31:58
[INFO] [stderr]    |
[INFO] [stderr] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stderr]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 84 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/serializer.rs:32:64
[INFO] [stderr]    |
[INFO] [stderr] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stderr]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 84 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/serializer.rs:33:60
[INFO] [stderr]    |
[INFO] [stderr] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stderr]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 84 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:31:9
[INFO] [stderr]    |
[INFO] [stderr] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 89 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:32:9
[INFO] [stderr]    |
[INFO] [stderr] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 89 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 89 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/serializer.rs:31:58
[INFO] [stderr]    |
[INFO] [stderr] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stderr]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 89 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/serializer.rs:32:64
[INFO] [stderr]    |
[INFO] [stderr] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stderr]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 89 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/serializer.rs:33:60
[INFO] [stderr]    |
[INFO] [stderr] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stderr]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 89 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:31:9
[INFO] [stderr]    |
[INFO] [stderr] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 94 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:32:9
[INFO] [stderr]    |
[INFO] [stderr] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 94 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 94 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/serializer.rs:31:58
[INFO] [stderr]    |
[INFO] [stderr] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stderr]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 94 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/serializer.rs:32:64
[INFO] [stderr]    |
[INFO] [stderr] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stderr]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 94 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/serializer.rs:33:60
[INFO] [stderr]    |
[INFO] [stderr] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stderr]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 94 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:31:9
[INFO] [stderr]    |
[INFO] [stderr] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 99 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:32:9
[INFO] [stderr]    |
[INFO] [stderr] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 99 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/serializer.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 99 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/serializer.rs:31:58
[INFO] [stderr]    |
[INFO] [stderr] 31 |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stderr]    |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 99 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/serializer.rs:32:64
[INFO] [stderr]    |
[INFO] [stderr] 32 |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stderr]    |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 99 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/serializer.rs:33:60
[INFO] [stderr]    |
[INFO] [stderr] 33 |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stderr]    |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 99 |         s!(self, key, val);
[INFO] [stderr]    |         ------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]    = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/serializer.rs:31:9
[INFO] [stderr]     |
[INFO] [stderr] 31  |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 104 |         s!(self, key, val);
[INFO] [stderr]     |         ------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/serializer.rs:32:9
[INFO] [stderr]     |
[INFO] [stderr] 32  |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 104 |         s!(self, key, val);
[INFO] [stderr]     |         ------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/serializer.rs:33:9
[INFO] [stderr]     |
[INFO] [stderr] 33  |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 104 |         s!(self, key, val);
[INFO] [stderr]     |         ------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/serializer.rs:31:58
[INFO] [stderr]     |
[INFO] [stderr] 31  |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stderr]     |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 104 |         s!(self, key, val);
[INFO] [stderr]     |         ------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/serializer.rs:32:64
[INFO] [stderr]     |
[INFO] [stderr] 32  |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stderr]     |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 104 |         s!(self, key, val);
[INFO] [stderr]     |         ------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/serializer.rs:33:60
[INFO] [stderr]     |
[INFO] [stderr] 33  |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stderr]     |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 104 |         s!(self, key, val);
[INFO] [stderr]     |         ------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/serializer.rs:31:9
[INFO] [stderr]     |
[INFO] [stderr] 31  |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 109 |         s!(self, key, val);
[INFO] [stderr]     |         ------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/serializer.rs:32:9
[INFO] [stderr]     |
[INFO] [stderr] 32  |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 109 |         s!(self, key, val);
[INFO] [stderr]     |         ------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/serializer.rs:33:9
[INFO] [stderr]     |
[INFO] [stderr] 33  |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 109 |         s!(self, key, val);
[INFO] [stderr]     |         ------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/serializer.rs:31:58
[INFO] [stderr]     |
[INFO] [stderr] 31  |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stderr]     |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 109 |         s!(self, key, val);
[INFO] [stderr]     |         ------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/serializer.rs:32:64
[INFO] [stderr]     |
[INFO] [stderr] 32  |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stderr]     |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 109 |         s!(self, key, val);
[INFO] [stderr]     |         ------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/serializer.rs:33:60
[INFO] [stderr]     |
[INFO] [stderr] 33  |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stderr]     |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 109 |         s!(self, key, val);
[INFO] [stderr]     |         ------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/serializer.rs:31:9
[INFO] [stderr]     |
[INFO] [stderr] 31  |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 114 |         s!(self, key, val);
[INFO] [stderr]     |         ------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/serializer.rs:32:9
[INFO] [stderr]     |
[INFO] [stderr] 32  |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 114 |         s!(self, key, val);
[INFO] [stderr]     |         ------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/serializer.rs:33:9
[INFO] [stderr]     |
[INFO] [stderr] 33  |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 114 |         s!(self, key, val);
[INFO] [stderr]     |         ------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/serializer.rs:31:58
[INFO] [stderr]     |
[INFO] [stderr] 31  |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stderr]     |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 114 |         s!(self, key, val);
[INFO] [stderr]     |         ------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/serializer.rs:32:64
[INFO] [stderr]     |
[INFO] [stderr] 32  |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stderr]     |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 114 |         s!(self, key, val);
[INFO] [stderr]     |         ------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/serializer.rs:33:60
[INFO] [stderr]     |
[INFO] [stderr] 33  |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stderr]     |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 114 |         s!(self, key, val);
[INFO] [stderr]     |         ------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/serializer.rs:31:9
[INFO] [stderr]     |
[INFO] [stderr] 31  |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 119 |         s!(self, key, val);
[INFO] [stderr]     |         ------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/serializer.rs:32:9
[INFO] [stderr]     |
[INFO] [stderr] 32  |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 119 |         s!(self, key, val);
[INFO] [stderr]     |         ------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/serializer.rs:33:9
[INFO] [stderr]     |
[INFO] [stderr] 33  |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 119 |         s!(self, key, val);
[INFO] [stderr]     |         ------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/serializer.rs:31:58
[INFO] [stderr]     |
[INFO] [stderr] 31  |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stderr]     |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 119 |         s!(self, key, val);
[INFO] [stderr]     |         ------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/serializer.rs:32:64
[INFO] [stderr]     |
[INFO] [stderr] 32  |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stderr]     |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 119 |         s!(self, key, val);
[INFO] [stderr]     |         ------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/serializer.rs:33:60
[INFO] [stderr]     |
[INFO] [stderr] 33  |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stderr]     |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 119 |         s!(self, key, val);
[INFO] [stderr]     |         ------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/serializer.rs:31:9
[INFO] [stderr]     |
[INFO] [stderr] 31  |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 124 |         s!(self, key, val);
[INFO] [stderr]     |         ------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/serializer.rs:32:9
[INFO] [stderr]     |
[INFO] [stderr] 32  |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 124 |         s!(self, key, val);
[INFO] [stderr]     |         ------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/serializer.rs:33:9
[INFO] [stderr]     |
[INFO] [stderr] 33  |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] ...
[INFO] [stderr] 124 |         s!(self, key, val);
[INFO] [stderr]     |         ------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/serializer.rs:31:58
[INFO] [stderr]     |
[INFO] [stderr] 31  |         try!($s.decorator.fmt_key(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $k)));
[INFO] [stderr]     |                                                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 124 |         s!(self, key, val);
[INFO] [stderr]     |         ------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/serializer.rs:32:64
[INFO] [stderr]     |
[INFO] [stderr] 32  |         try!($s.decorator.fmt_separator(&mut $s.io, &|io: &mut io::Write| write!(io, ": ")));
[INFO] [stderr]     |                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 124 |         s!(self, key, val);
[INFO] [stderr]     |         ------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/serializer.rs:33:60
[INFO] [stderr]     |
[INFO] [stderr] 33  |         try!($s.decorator.fmt_value(&mut $s.io, &|io: &mut io::Write| write!(io, "{}", $v)));
[INFO] [stderr]     |                                                            ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] ...
[INFO] [stderr] 124 |         s!(self, key, val);
[INFO] [stderr]     |         ------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:142:9
[INFO] [stderr]     |
[INFO] [stderr] 142 |         try!(io.write_all(b"<pre style=\"margin-bottom:-0.5em\">"));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:144:9
[INFO] [stderr]     |
[INFO] [stderr] 144 |         try!(r_decorator.fmt_timestamp(io, &*self.fn_timestamp));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:145:9
[INFO] [stderr]     |
[INFO] [stderr] 145 |         try!(r_decorator.fmt_level(io, &|io| write!(io, " {} ", record.level().as_short_str())));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:146:9
[INFO] [stderr]     |
[INFO] [stderr] 146 |         try!(r_decorator.fmt_msg(io, &|io| write!(io, "{}", record.msg())));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:135:29
[INFO] [stderr]     |
[INFO] [stderr] 135 |                    io: &mut io::Write,
[INFO] [stderr]     |                             ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:151:13
[INFO] [stderr]     |
[INFO] [stderr] 151 |             try!(serializer.print_comma());
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:152:13
[INFO] [stderr]     |
[INFO] [stderr] 152 |             try!(v.serialize(record, k, &mut serializer));
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:156:13
[INFO] [stderr]     |
[INFO] [stderr] 156 |             try!(serializer.print_comma());
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:157:13
[INFO] [stderr]     |
[INFO] [stderr] 157 |             try!(v.serialize(record, k, &mut serializer));
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:195:9
[INFO] [stderr]     |
[INFO] [stderr] 195 |         try!(io.write_all(b"<pre style=\"margin-bottom:-0.5em\">"));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:197:9
[INFO] [stderr]     |
[INFO] [stderr] 197 |         try!(self.print_indent(io, indent));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:198:9
[INFO] [stderr]     |
[INFO] [stderr] 198 |         try!(r_decorator.fmt_timestamp(io, &*self.fn_timestamp));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:199:9
[INFO] [stderr]     |
[INFO] [stderr] 199 |         try!(r_decorator.fmt_level(io, &|io| write!(io, " {} ", record.level().as_short_str())));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:200:9
[INFO] [stderr]     |
[INFO] [stderr] 200 |         try!(r_decorator.fmt_msg(io, &|io| write!(io, "{}", record.msg())));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:166:32
[INFO] [stderr]     |
[INFO] [stderr] 166 |                       io: &mut io::Write,
[INFO] [stderr]     |                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:172:38
[INFO] [stderr]     |
[INFO] [stderr] 172 |         let mut record_value_stack = try!(self.record_value_stack(record, logger_values));
[INFO] [stderr]     |                                      ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:183:17
[INFO] [stderr]     |
[INFO] [stderr] 183 |                 try!(io.write_all(b"<pre style=\"margin-bottom:-0.5em\">"));
[INFO] [stderr]     |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:184:17
[INFO] [stderr]     |
[INFO] [stderr] 184 |                 try!(self.print_indent(io, i));
[INFO] [stderr]     |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:185:17
[INFO] [stderr]     |
[INFO] [stderr] 185 |                 try!(io.write_all(&record_value_stack[i]));
[INFO] [stderr]     |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:186:17
[INFO] [stderr]     |
[INFO] [stderr] 186 |                 try!(io.write_all(b"</pre>\n"));
[INFO] [stderr]     |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:205:13
[INFO] [stderr]     |
[INFO] [stderr] 205 |             try!(serializer.print_comma());
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:206:13
[INFO] [stderr]     |
[INFO] [stderr] 206 |             try!(v.serialize(record, k, &mut serializer));
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:232:17
[INFO] [stderr]     |
[INFO] [stderr] 232 |                 try!(v.serialize(record, k, &mut serializer));
[INFO] [stderr]     |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:230:21
[INFO] [stderr]     |
[INFO] [stderr] 230 |                     try!(serializer.print_comma());
[INFO] [stderr]     |                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:247:29
[INFO] [stderr]     |
[INFO] [stderr] 247 |             let mut value = try!(self.record_value_stack(record, parent));
[INFO] [stderr]     |                             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:254:37
[INFO] [stderr]     |
[INFO] [stderr] 254 |     fn print_indent(&self, io: &mut io::Write, indent: usize) -> io::Result<()> {
[INFO] [stderr]     |                                     ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:256:13
[INFO] [stderr]     |
[INFO] [stderr] 256 |             try!(write!(io, "  "));
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:264:24
[INFO] [stderr]     |
[INFO] [stderr] 264 |               io: &mut io::Write,
[INFO] [stderr]     |                        ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:276:24
[INFO] [stderr]     |
[INFO] [stderr] 276 | pub type TimestampFn = Fn(&mut io::Write) -> io::Result<()> + Send + Sync;
[INFO] [stderr]     |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut io::Write) -> io::Result<()> + Send + Sync`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:276:32
[INFO] [stderr]     |
[INFO] [stderr] 276 | pub type TimestampFn = Fn(&mut io::Write) -> io::Result<()> + Send + Sync;
[INFO] [stderr]     |                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:283:33
[INFO] [stderr]     |
[INFO] [stderr] 283 | pub fn timestamp_local(io: &mut io::Write) -> io::Result<()> {
[INFO] [stderr]     |                                 ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:290:31
[INFO] [stderr]     |
[INFO] [stderr] 290 | pub fn timestamp_utc(io: &mut io::Write) -> io::Result<()> {
[INFO] [stderr]     |                               ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:381:26
[INFO] [stderr]     |
[INFO] [stderr] 381 |         where F: Fn(&mut io::Write) -> io::Result<()> + 'static + Send + Sync
[INFO] [stderr]     |                          ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `slog::OwnedKeyValueList::parent`: &Option<...> is a stupid type to return. Use `get_parent` for now.
[INFO] [stderr]    --> src/lib.rs:246:54
[INFO] [stderr]     |
[INFO] [stderr] 246 |         if let Some(ref parent) = *logger_values_ref.parent() {
[INFO] [stderr]     |                                                      ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:160:14
[INFO] [stderr]     |
[INFO] [stderr] 160 |         let (mut io, _) = serializer.finish();
[INFO] [stderr]     |              ----^^
[INFO] [stderr]     |              |
[INFO] [stderr]     |              help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:209:14
[INFO] [stderr]     |
[INFO] [stderr] 209 |         let (mut io, _) = serializer.finish();
[INFO] [stderr]     |              ----^^
[INFO] [stderr]     |              |
[INFO] [stderr]     |              help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: `slog-html` (lib) generated 186 warnings
[INFO] [stderr] warning: `slog-html` (lib test) generated 186 warnings (186 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/slog_html-682b46bbbdfb2c70)
[INFO] [stdout] running 0 tests
[INFO] [stderr]    Doc-tests slog-html
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - (line 7) ... FAILED
[INFO] [stdout] test src/lib.rs - (line 40) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - (line 7) stdout ----
[INFO] [stdout] Test executable failed (exit code 101).
[INFO] [stdout] 
[INFO] [stdout] stderr:
[INFO] [stdout] thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Os { code: 2, kind: NotFound, message: "No such file or directory" }', src/lib.rs:16:34
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x562c116b21e0 - std::backtrace_rs::backtrace::libunwind::trace::hff4d1766e93f64f1
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/../../backtrace/src/backtrace/libunwind.rs:90:5
[INFO] [stdout]    1:     0x562c116b21e0 - std::backtrace_rs::backtrace::trace_unsynchronized::h56bbc8eb78770bcb
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x562c116b21e0 - std::sys_common::backtrace::_print_fmt::h5c8e75464faca780
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/sys_common/backtrace.rs:67:5
[INFO] [stdout]    3:     0x562c116b21e0 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h48b88277def8b362
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/sys_common/backtrace.rs:46:22
[INFO] [stdout]    4:     0x562c116d090c - core::fmt::write::h3381b3176fe2b3d3
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/core/src/fmt/mod.rs:1115:17
[INFO] [stdout]    5:     0x562c116b0c05 - std::io::Write::write_fmt::hd42607e5d8e44db0
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/io/mod.rs:1665:15
[INFO] [stdout]    6:     0x562c116b404b - std::sys_common::backtrace::_print::ha537687d6c17dd0d
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/sys_common/backtrace.rs:49:5
[INFO] [stdout]    7:     0x562c116b404b - std::sys_common::backtrace::print::h61376ae57d131d72
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/sys_common/backtrace.rs:36:9
[INFO] [stdout]    8:     0x562c116b404b - std::panicking::default_hook::{{closure}}::h0f7208c0b9644a54
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:208:50
[INFO] [stdout]    9:     0x562c116b3b21 - std::panicking::default_hook::hdac7fc06578c14ce
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:225:9
[INFO] [stdout]   10:     0x562c116b4714 - std::panicking::rust_panic_with_hook::h72b21c283da3d1ef
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:622:17
[INFO] [stdout]   11:     0x562c116b41f7 - std::panicking::begin_panic_handler::{{closure}}::he5778f1729cff84a
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:519:13
[INFO] [stdout]   12:     0x562c116b26bc - std::sys_common::backtrace::__rust_end_short_backtrace::h2d11ca8b453b4b1d
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/sys_common/backtrace.rs:141:18
[INFO] [stdout]   13:     0x562c116b4159 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:515:5
[INFO] [stdout]   14:     0x562c11665e21 - core::panicking::panic_fmt::hf9de31d4acbce4db
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/core/src/panicking.rs:92:14
[INFO] [stdout]   15:     0x562c11665f13 - core::result::unwrap_failed::ha0c84e81219e5878
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/core/src/result.rs:1599:5
[INFO] [stdout]   16:     0x562c11671b7a - core::result::Result<T,E>::unwrap::h1deb4a56e17f0908
[INFO] [stdout]   17:     0x562c116835f5 - rust_out::main::h61823b600df25383
[INFO] [stdout]   18:     0x562c1166beb3 - core::ops::function::FnOnce::call_once::h3d07824a44777914
[INFO] [stdout]   19:     0x562c11666bc9 - std::sys_common::backtrace::__rust_begin_short_backtrace::h1ee1ba859d3174aa
[INFO] [stdout]   20:     0x562c11667c69 - std::rt::lang_start::{{closure}}::hee9719d6b6efb7fa
[INFO] [stdout]   21:     0x562c116b4c1a - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::ha88a7d1a4d24e549
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/core/src/ops/function.rs:259:13
[INFO] [stdout]   22:     0x562c116b4c1a - std::panicking::try::do_call::hd3b1d7740607ccc7
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:401:40
[INFO] [stdout]   23:     0x562c116b4c1a - std::panicking::try::h0ee8c65ac7461507
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:365:19
[INFO] [stdout]   24:     0x562c116b4c1a - std::panic::catch_unwind::head47f0de4ccd838
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panic.rs:434:14
[INFO] [stdout]   25:     0x562c116b4c1a - std::rt::lang_start_internal::{{closure}}::hbc7de8ec820ac085
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/rt.rs:45:48
[INFO] [stdout]   26:     0x562c116b4c1a - std::panicking::try::do_call::h2609e52e8bad4a7b
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:401:40
[INFO] [stdout]   27:     0x562c116b4c1a - std::panicking::try::hd0929f0b603e0389
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:365:19
[INFO] [stdout]   28:     0x562c116b4c1a - std::panic::catch_unwind::h27902b81c3e47571
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panic.rs:434:14
[INFO] [stdout]   29:     0x562c116b4c1a - std::rt::lang_start_internal::h3fb2d794dd391e3e
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/rt.rs:45:20
[INFO] [stdout]   30:     0x562c11667c41 - std::rt::lang_start::h0745d281d96e0cdb
[INFO] [stdout]   31:     0x562c11683943 - main
[INFO] [stdout]   32:     0x7fb98e2ad0b3 - __libc_start_main
[INFO] [stdout]   33:     0x562c116665de - _start
[INFO] [stdout]   34:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - (line 40) stdout ----
[INFO] [stdout] Test executable failed (exit code 101).
[INFO] [stdout] 
[INFO] [stdout] stderr:
[INFO] [stdout] thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Os { code: 2, kind: NotFound, message: "No such file or directory" }', src/lib.rs:16:34
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x563a48311510 - std::backtrace_rs::backtrace::libunwind::trace::hff4d1766e93f64f1
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/../../backtrace/src/backtrace/libunwind.rs:90:5
[INFO] [stdout]    1:     0x563a48311510 - std::backtrace_rs::backtrace::trace_unsynchronized::h56bbc8eb78770bcb
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x563a48311510 - std::sys_common::backtrace::_print_fmt::h5c8e75464faca780
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/sys_common/backtrace.rs:67:5
[INFO] [stdout]    3:     0x563a48311510 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h48b88277def8b362
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/sys_common/backtrace.rs:46:22
[INFO] [stdout]    4:     0x563a4832fc3c - core::fmt::write::h3381b3176fe2b3d3
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/core/src/fmt/mod.rs:1115:17
[INFO] [stdout]    5:     0x563a4830ff35 - std::io::Write::write_fmt::hd42607e5d8e44db0
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/io/mod.rs:1665:15
[INFO] [stdout]    6:     0x563a4831337b - std::sys_common::backtrace::_print::ha537687d6c17dd0d
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/sys_common/backtrace.rs:49:5
[INFO] [stdout]    7:     0x563a4831337b - std::sys_common::backtrace::print::h61376ae57d131d72
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/sys_common/backtrace.rs:36:9
[INFO] [stdout]    8:     0x563a4831337b - std::panicking::default_hook::{{closure}}::h0f7208c0b9644a54
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:208:50
[INFO] [stdout]    9:     0x563a48312e51 - std::panicking::default_hook::hdac7fc06578c14ce
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:225:9
[INFO] [stdout]   10:     0x563a48313a44 - std::panicking::rust_panic_with_hook::h72b21c283da3d1ef
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:622:17
[INFO] [stdout]   11:     0x563a48313527 - std::panicking::begin_panic_handler::{{closure}}::he5778f1729cff84a
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:519:13
[INFO] [stdout]   12:     0x563a483119ec - std::sys_common::backtrace::__rust_end_short_backtrace::h2d11ca8b453b4b1d
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/sys_common/backtrace.rs:141:18
[INFO] [stdout]   13:     0x563a48313489 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:515:5
[INFO] [stdout]   14:     0x563a482c4e21 - core::panicking::panic_fmt::hf9de31d4acbce4db
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/core/src/panicking.rs:92:14
[INFO] [stdout]   15:     0x563a482c4f13 - core::result::unwrap_failed::ha0c84e81219e5878
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/core/src/result.rs:1599:5
[INFO] [stdout]   16:     0x563a482d0b7a - core::result::Result<T,E>::unwrap::h1deb4a56e17f0908
[INFO] [stdout]   17:     0x563a482e25fd - rust_out::main::h61823b600df25383
[INFO] [stdout]   18:     0x563a482caeb3 - core::ops::function::FnOnce::call_once::h3d07824a44777914
[INFO] [stdout]   19:     0x563a482c5bc9 - std::sys_common::backtrace::__rust_begin_short_backtrace::h1ee1ba859d3174aa
[INFO] [stdout]   20:     0x563a482c6c69 - std::rt::lang_start::{{closure}}::hee9719d6b6efb7fa
[INFO] [stdout]   21:     0x563a48313f4a - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::ha88a7d1a4d24e549
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/core/src/ops/function.rs:259:13
[INFO] [stdout]   22:     0x563a48313f4a - std::panicking::try::do_call::hd3b1d7740607ccc7
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:401:40
[INFO] [stdout]   23:     0x563a48313f4a - std::panicking::try::h0ee8c65ac7461507
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:365:19
[INFO] [stdout]   24:     0x563a48313f4a - std::panic::catch_unwind::head47f0de4ccd838
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panic.rs:434:14
[INFO] [stdout]   25:     0x563a48313f4a - std::rt::lang_start_internal::{{closure}}::hbc7de8ec820ac085
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/rt.rs:45:48
[INFO] [stdout]   26:     0x563a48313f4a - std::panicking::try::do_call::h2609e52e8bad4a7b
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:401:40
[INFO] [stdout]   27:     0x563a48313f4a - std::panicking::try::hd0929f0b603e0389
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:365:19
[INFO] [stdout]   28:     0x563a48313f4a - std::panic::catch_unwind::h27902b81c3e47571
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panic.rs:434:14
[INFO] [stdout]   29:     0x563a48313f4a - std::rt::lang_start_internal::h3fb2d794dd391e3e
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/rt.rs:45:20
[INFO] [stdout]   30:     0x563a482c6c41 - std::rt::lang_start::h0745d281d96e0cdb
[INFO] [stdout]   31:     0x563a482e2b23 - main
[INFO] [stdout]   32:     0x7f0fbdedc0b3 - __libc_start_main
[INFO] [stdout]   33:     0x563a482c55de - _start
[INFO] [stdout]   34:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - (line 40)
[INFO] [stdout]     src/lib.rs - (line 7)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 2 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.99s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] running `Command { std: "docker" "inspect" "53d24d5b58c9c4d21067235fa9e959ba5c54dad6cd494652d30c04bb13a8c1ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "53d24d5b58c9c4d21067235fa9e959ba5c54dad6cd494652d30c04bb13a8c1ba", kill_on_drop: false }`
[INFO] [stdout] 53d24d5b58c9c4d21067235fa9e959ba5c54dad6cd494652d30c04bb13a8c1ba
