[INFO] fetching crate sane 0.2.1...
[INFO] testing sane-0.2.1 against try#8de4c7234dd9b97c9d76b58671343fdbbc9a433e+target=x86_64-unknown-linux-musl for musl_upgrade_1_2_5_with_libc_patch_0
[INFO] extracting crate sane 0.2.1 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate sane 0.2.1
[INFO] finished tweaking crates.io crate sane 0.2.1
[INFO] tweaked toml for crates.io crate sane 0.2.1 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate sane 0.2.1 on toolchain 8de4c7234dd9b97c9d76b58671343fdbbc9a433e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 6 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a83109f9ba650eaf9d45b51f47098202ab84312bff254aa5d07a2aecbc78e62c
[INFO] running `Command { std: "docker" "start" "-a" "a83109f9ba650eaf9d45b51f47098202ab84312bff254aa5d07a2aecbc78e62c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a83109f9ba650eaf9d45b51f47098202ab84312bff254aa5d07a2aecbc78e62c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a83109f9ba650eaf9d45b51f47098202ab84312bff254aa5d07a2aecbc78e62c", kill_on_drop: false }`
[INFO] [stdout] a83109f9ba650eaf9d45b51f47098202ab84312bff254aa5d07a2aecbc78e62c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "build" "--frozen" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] c857d757173cfc16ecf2b602349af0ba491a6d28b0da9d75b406b48ab2d07110
[INFO] running `Command { std: "docker" "start" "-a" "c857d757173cfc16ecf2b602349af0ba491a6d28b0da9d75b406b48ab2d07110", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.219
[INFO] [stderr]    Compiling sane v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/datetime.rs:210:29
[INFO] [stdout]     |
[INFO] [stdout] 210 |                         b'0'...b'9' => {
[INFO] [stdout]     |                             ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/ser.rs:482:20
[INFO] [stdout]     |
[INFO] [stdout] 482 |             (Some(0...1), _) | (_, &None) => {
[INFO] [stdout]     |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/ser.rs:520:16
[INFO] [stdout]     |
[INFO] [stdout] 520 |             'a'...'z' | 'A'...'Z' | '0'...'9' | '-' | '_' => true,
[INFO] [stdout]     |                ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/ser.rs:520:28
[INFO] [stdout]     |
[INFO] [stdout] 520 |             'a'...'z' | 'A'...'Z' | '0'...'9' | '-' | '_' => true,
[INFO] [stdout]     |                            ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/ser.rs:520:40
[INFO] [stdout]     |
[INFO] [stdout] 520 |             'a'...'z' | 'A'...'Z' | '0'...'9' | '-' | '_' => true,
[INFO] [stdout]     |                                        ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]     --> src/ser.rs:1000:24
[INFO] [stdout]      |
[INFO] [stdout] 1000 |                 (Some(0...1), _) | (_, &None) => {
[INFO] [stdout]      |                        ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]      |
[INFO] [stdout]      = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]      = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/tokens.rs:297:22
[INFO] [stdout]     |
[INFO] [stdout] 297 |           new_ch: &mut FnMut(
[INFO] [stdout]     |  ______________________^
[INFO] [stdout] 298 | |             &mut Tokenizer,
[INFO] [stdout] 299 | |             &mut MaybeString,
[INFO] [stdout] 300 | |             bool,
[INFO] [stdout] 301 | |             usize,
[INFO] [stdout] 302 | |             char,
[INFO] [stdout] 303 | |         ) -> Result<(), Error>,
[INFO] [stdout]     | |______________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 297 |         new_ch: &mut dyn FnMut(
[INFO] [stdout]     |                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/ser.rs:431:9
[INFO] [stdout]     |
[INFO] [stdout] 431 |         drop(write!(self.dst, "{}", t));
[INFO] [stdout]     |         ^^^^^-------------------------^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              argument has type `Result<(), std::fmt::Error>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dropping_copy_types)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 431 -         drop(write!(self.dst, "{}", t));
[INFO] [stdout] 431 +         let _ = write!(self.dst, "{}", t);
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/ser.rs:524:13
[INFO] [stdout]     |
[INFO] [stdout] 524 |             drop(write!(self.dst, "{}", key));
[INFO] [stdout]     |             ^^^^^---------------------------^
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  argument has type `Result<(), std::fmt::Error>`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 524 -             drop(write!(self.dst, "{}", key));
[INFO] [stdout] 524 +             let _ = write!(self.dst, "{}", key);
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/ser.rs:759:13
[INFO] [stdout]     |
[INFO] [stdout] 759 |             drop(write!($this.dst, "-"));
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 824 |         serialize_float!(self, v)
[INFO] [stdout]     |         -------------------------
[INFO] [stdout]     |         |
[INFO] [stdout]     |         argument has type `Result<(), std::fmt::Error>`
[INFO] [stdout]     |         in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `serialize_float` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 759 -             drop(write!($this.dst, "-"));
[INFO] [stdout] 759 +             let _ = write!($this.dst, "-");
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/ser.rs:762:13
[INFO] [stdout]     |
[INFO] [stdout] 762 |             drop(write!($this.dst, "nan"));
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 824 |         serialize_float!(self, v)
[INFO] [stdout]     |         -------------------------
[INFO] [stdout]     |         |
[INFO] [stdout]     |         argument has type `Result<(), std::fmt::Error>`
[INFO] [stdout]     |         in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `serialize_float` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 762 -             drop(write!($this.dst, "nan"));
[INFO] [stdout] 762 +             let _ = write!($this.dst, "nan");
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/ser.rs:764:13
[INFO] [stdout]     |
[INFO] [stdout] 764 |             drop(write!($this.dst, "{}", $v));
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 824 |         serialize_float!(self, v)
[INFO] [stdout]     |         -------------------------
[INFO] [stdout]     |         |
[INFO] [stdout]     |         argument has type `Result<(), std::fmt::Error>`
[INFO] [stdout]     |         in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `serialize_float` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 764 -             drop(write!($this.dst, "{}", $v));
[INFO] [stdout] 764 +             let _ = write!($this.dst, "{}", $v);
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/ser.rs:767:13
[INFO] [stdout]     |
[INFO] [stdout] 767 |             drop(write!($this.dst, ".0"));
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 824 |         serialize_float!(self, v)
[INFO] [stdout]     |         -------------------------
[INFO] [stdout]     |         |
[INFO] [stdout]     |         argument has type `Result<(), std::fmt::Error>`
[INFO] [stdout]     |         in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `serialize_float` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 767 -             drop(write!($this.dst, ".0"));
[INFO] [stdout] 767 +             let _ = write!($this.dst, ".0");
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/ser.rs:759:13
[INFO] [stdout]     |
[INFO] [stdout] 759 |             drop(write!($this.dst, "-"));
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 828 |         serialize_float!(self, v)
[INFO] [stdout]     |         -------------------------
[INFO] [stdout]     |         |
[INFO] [stdout]     |         argument has type `Result<(), std::fmt::Error>`
[INFO] [stdout]     |         in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `serialize_float` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 759 -             drop(write!($this.dst, "-"));
[INFO] [stdout] 759 +             let _ = write!($this.dst, "-");
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/ser.rs:762:13
[INFO] [stdout]     |
[INFO] [stdout] 762 |             drop(write!($this.dst, "nan"));
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 828 |         serialize_float!(self, v)
[INFO] [stdout]     |         -------------------------
[INFO] [stdout]     |         |
[INFO] [stdout]     |         argument has type `Result<(), std::fmt::Error>`
[INFO] [stdout]     |         in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `serialize_float` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 762 -             drop(write!($this.dst, "nan"));
[INFO] [stdout] 762 +             let _ = write!($this.dst, "nan");
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/ser.rs:764:13
[INFO] [stdout]     |
[INFO] [stdout] 764 |             drop(write!($this.dst, "{}", $v));
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 828 |         serialize_float!(self, v)
[INFO] [stdout]     |         -------------------------
[INFO] [stdout]     |         |
[INFO] [stdout]     |         argument has type `Result<(), std::fmt::Error>`
[INFO] [stdout]     |         in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `serialize_float` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 764 -             drop(write!($this.dst, "{}", $v));
[INFO] [stdout] 764 +             let _ = write!($this.dst, "{}", $v);
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/ser.rs:767:13
[INFO] [stdout]     |
[INFO] [stdout] 767 |             drop(write!($this.dst, ".0"));
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 828 |         serialize_float!(self, v)
[INFO] [stdout]     |         -------------------------
[INFO] [stdout]     |         |
[INFO] [stdout]     |         argument has type `Result<(), std::fmt::Error>`
[INFO] [stdout]     |         in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `serialize_float` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 767 -             drop(write!($this.dst, ".0"));
[INFO] [stdout] 767 +             let _ = write!($this.dst, ".0");
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/tokens.rs:517:30
[INFO] [stdout]     |
[INFO] [stdout] 517 |     fn into_cow(self, input: &str) -> Cow<str> {
[INFO] [stdout]     |                              ^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                              |
[INFO] [stdout]     |                              this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 517 |     fn into_cow(self, input: &str) -> Cow<'_, str> {
[INFO] [stdout]     |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.39s
[INFO] running `Command { std: "docker" "inspect" "c857d757173cfc16ecf2b602349af0ba491a6d28b0da9d75b406b48ab2d07110", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c857d757173cfc16ecf2b602349af0ba491a6d28b0da9d75b406b48ab2d07110", kill_on_drop: false }`
[INFO] [stdout] c857d757173cfc16ecf2b602349af0ba491a6d28b0da9d75b406b48ab2d07110
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "test" "--frozen" "--no-run" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] 17e897136dc20504c2f490c55f8c6e12773dac6258f1bace7eb9a914eba3141f
[INFO] running `Command { std: "docker" "start" "-a" "17e897136dc20504c2f490c55f8c6e12773dac6258f1bace7eb9a914eba3141f", kill_on_drop: false }`
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/datetime.rs:210:29
[INFO] [stdout]     |
[INFO] [stdout] 210 |                         b'0'...b'9' => {
[INFO] [stdout]     |                             ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/ser.rs:482:20
[INFO] [stdout]     |
[INFO] [stdout] 482 |             (Some(0...1), _) | (_, &None) => {
[INFO] [stdout]     |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/ser.rs:520:16
[INFO] [stdout]     |
[INFO] [stdout] 520 |             'a'...'z' | 'A'...'Z' | '0'...'9' | '-' | '_' => true,
[INFO] [stdout]     |                ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/ser.rs:520:28
[INFO] [stdout]     |
[INFO] [stdout] 520 |             'a'...'z' | 'A'...'Z' | '0'...'9' | '-' | '_' => true,
[INFO] [stdout]     |                            ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/ser.rs:520:40
[INFO] [stdout]     |
[INFO] [stdout] 520 |             'a'...'z' | 'A'...'Z' | '0'...'9' | '-' | '_' => true,
[INFO] [stdout]     |                                        ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]     --> src/ser.rs:1000:24
[INFO] [stdout]      |
[INFO] [stdout] 1000 |                 (Some(0...1), _) | (_, &None) => {
[INFO] [stdout]      |                        ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]      |
[INFO] [stdout]      = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]      = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/tokens.rs:297:22
[INFO] [stdout]     |
[INFO] [stdout] 297 |           new_ch: &mut FnMut(
[INFO] [stdout]     |  ______________________^
[INFO] [stdout] 298 | |             &mut Tokenizer,
[INFO] [stdout] 299 | |             &mut MaybeString,
[INFO] [stdout] 300 | |             bool,
[INFO] [stdout] 301 | |             usize,
[INFO] [stdout] 302 | |             char,
[INFO] [stdout] 303 | |         ) -> Result<(), Error>,
[INFO] [stdout]     | |______________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 297 |         new_ch: &mut dyn FnMut(
[INFO] [stdout]     |                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/ser.rs:431:9
[INFO] [stdout]     |
[INFO] [stdout] 431 |         drop(write!(self.dst, "{}", t));
[INFO] [stdout]     |         ^^^^^-------------------------^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              argument has type `Result<(), std::fmt::Error>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dropping_copy_types)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 431 -         drop(write!(self.dst, "{}", t));
[INFO] [stdout] 431 +         let _ = write!(self.dst, "{}", t);
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/ser.rs:524:13
[INFO] [stdout]     |
[INFO] [stdout] 524 |             drop(write!(self.dst, "{}", key));
[INFO] [stdout]     |             ^^^^^---------------------------^
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  argument has type `Result<(), std::fmt::Error>`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 524 -             drop(write!(self.dst, "{}", key));
[INFO] [stdout] 524 +             let _ = write!(self.dst, "{}", key);
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/ser.rs:759:13
[INFO] [stdout]     |
[INFO] [stdout] 759 |             drop(write!($this.dst, "-"));
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 824 |         serialize_float!(self, v)
[INFO] [stdout]     |         -------------------------
[INFO] [stdout]     |         |
[INFO] [stdout]     |         argument has type `Result<(), std::fmt::Error>`
[INFO] [stdout]     |         in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `serialize_float` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 759 -             drop(write!($this.dst, "-"));
[INFO] [stdout] 759 +             let _ = write!($this.dst, "-");
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/ser.rs:762:13
[INFO] [stdout]     |
[INFO] [stdout] 762 |             drop(write!($this.dst, "nan"));
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 824 |         serialize_float!(self, v)
[INFO] [stdout]     |         -------------------------
[INFO] [stdout]     |         |
[INFO] [stdout]     |         argument has type `Result<(), std::fmt::Error>`
[INFO] [stdout]     |         in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `serialize_float` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 762 -             drop(write!($this.dst, "nan"));
[INFO] [stdout] 762 +             let _ = write!($this.dst, "nan");
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/ser.rs:764:13
[INFO] [stdout]     |
[INFO] [stdout] 764 |             drop(write!($this.dst, "{}", $v));
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 824 |         serialize_float!(self, v)
[INFO] [stdout]     |         -------------------------
[INFO] [stdout]     |         |
[INFO] [stdout]     |         argument has type `Result<(), std::fmt::Error>`
[INFO] [stdout]     |         in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `serialize_float` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 764 -             drop(write!($this.dst, "{}", $v));
[INFO] [stdout] 764 +             let _ = write!($this.dst, "{}", $v);
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/ser.rs:767:13
[INFO] [stdout]     |
[INFO] [stdout] 767 |             drop(write!($this.dst, ".0"));
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 824 |         serialize_float!(self, v)
[INFO] [stdout]     |         -------------------------
[INFO] [stdout]     |         |
[INFO] [stdout]     |         argument has type `Result<(), std::fmt::Error>`
[INFO] [stdout]     |         in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `serialize_float` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 767 -             drop(write!($this.dst, ".0"));
[INFO] [stdout] 767 +             let _ = write!($this.dst, ".0");
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling sane v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/ser.rs:759:13
[INFO] [stdout]     |
[INFO] [stdout] 759 |             drop(write!($this.dst, "-"));
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 828 |         serialize_float!(self, v)
[INFO] [stdout]     |         -------------------------
[INFO] [stdout]     |         |
[INFO] [stdout]     |         argument has type `Result<(), std::fmt::Error>`
[INFO] [stdout]     |         in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `serialize_float` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 759 -             drop(write!($this.dst, "-"));
[INFO] [stdout] 759 +             let _ = write!($this.dst, "-");
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/ser.rs:762:13
[INFO] [stdout]     |
[INFO] [stdout] 762 |             drop(write!($this.dst, "nan"));
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 828 |         serialize_float!(self, v)
[INFO] [stdout]     |         -------------------------
[INFO] [stdout]     |         |
[INFO] [stdout]     |         argument has type `Result<(), std::fmt::Error>`
[INFO] [stdout]     |         in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `serialize_float` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 762 -             drop(write!($this.dst, "nan"));
[INFO] [stdout] 762 +             let _ = write!($this.dst, "nan");
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/ser.rs:764:13
[INFO] [stdout]     |
[INFO] [stdout] 764 |             drop(write!($this.dst, "{}", $v));
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 828 |         serialize_float!(self, v)
[INFO] [stdout]     |         -------------------------
[INFO] [stdout]     |         |
[INFO] [stdout]     |         argument has type `Result<(), std::fmt::Error>`
[INFO] [stdout]     |         in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `serialize_float` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 764 -             drop(write!($this.dst, "{}", $v));
[INFO] [stdout] 764 +             let _ = write!($this.dst, "{}", $v);
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/ser.rs:767:13
[INFO] [stdout]     |
[INFO] [stdout] 767 |             drop(write!($this.dst, ".0"));
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 828 |         serialize_float!(self, v)
[INFO] [stdout]     |         -------------------------
[INFO] [stdout]     |         |
[INFO] [stdout]     |         argument has type `Result<(), std::fmt::Error>`
[INFO] [stdout]     |         in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `serialize_float` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 767 -             drop(write!($this.dst, ".0"));
[INFO] [stdout] 767 +             let _ = write!($this.dst, ".0");
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/tokens.rs:517:30
[INFO] [stdout]     |
[INFO] [stdout] 517 |     fn into_cow(self, input: &str) -> Cow<str> {
[INFO] [stdout]     |                              ^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                              |
[INFO] [stdout]     |                              this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 517 |     fn into_cow(self, input: &str) -> Cow<'_, str> {
[INFO] [stdout]     |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: fields `global_string`, `global_integer`, `server`, and `peers` are never read
[INFO] [stdout]   --> examples/decode.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct Config {
[INFO] [stdout]    |        ------ fields in this struct
[INFO] [stdout] 13 |     global_string: Option<String>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 14 |     global_integer: Option<u64>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 15 |     server: Option<ServerConfig>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 16 |     peers: Option<Vec<PeerConfig>>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Config` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> examples/decode.rs:4:9
[INFO] [stdout]    |
[INFO] [stdout] 4  | #![deny(warnings)]
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    = note: `#[deny(dead_code)]` implied by `#[deny(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: fields `ip` and `port` are never read
[INFO] [stdout]   --> examples/decode.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 24 | struct ServerConfig {
[INFO] [stdout]    |        ------------ fields in this struct
[INFO] [stdout] 25 |     ip: Option<String>,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 26 |     port: Option<u64>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ServerConfig` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: fields `ip` and `port` are never read
[INFO] [stdout]   --> examples/decode.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 30 | struct PeerConfig {
[INFO] [stdout]    |        ---------- fields in this struct
[INFO] [stdout] 31 |     ip: Option<String>,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 32 |     port: Option<u64>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `PeerConfig` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `sane` (example "decode") due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/datetime.rs:210:29
[INFO] [stdout]     |
[INFO] [stdout] 210 |                         b'0'...b'9' => {
[INFO] [stdout]     |                             ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/ser.rs:482:20
[INFO] [stdout]     |
[INFO] [stdout] 482 |             (Some(0...1), _) | (_, &None) => {
[INFO] [stdout]     |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/ser.rs:520:16
[INFO] [stdout]     |
[INFO] [stdout] 520 |             'a'...'z' | 'A'...'Z' | '0'...'9' | '-' | '_' => true,
[INFO] [stdout]     |                ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/ser.rs:520:28
[INFO] [stdout]     |
[INFO] [stdout] 520 |             'a'...'z' | 'A'...'Z' | '0'...'9' | '-' | '_' => true,
[INFO] [stdout]     |                            ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/ser.rs:520:40
[INFO] [stdout]     |
[INFO] [stdout] 520 |             'a'...'z' | 'A'...'Z' | '0'...'9' | '-' | '_' => true,
[INFO] [stdout]     |                                        ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]     --> src/ser.rs:1000:24
[INFO] [stdout]      |
[INFO] [stdout] 1000 |                 (Some(0...1), _) | (_, &None) => {
[INFO] [stdout]      |                        ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]      |
[INFO] [stdout]      = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]      = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Deserialize` and `IntoDeserializer`
[INFO] [stdout]  --> src/macros.rs:1:21
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub use serde::de::{Deserialize, IntoDeserializer};
[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/tokens.rs:297:22
[INFO] [stdout]     |
[INFO] [stdout] 297 |           new_ch: &mut FnMut(
[INFO] [stdout]     |  ______________________^
[INFO] [stdout] 298 | |             &mut Tokenizer,
[INFO] [stdout] 299 | |             &mut MaybeString,
[INFO] [stdout] 300 | |             bool,
[INFO] [stdout] 301 | |             usize,
[INFO] [stdout] 302 | |             char,
[INFO] [stdout] 303 | |         ) -> Result<(), Error>,
[INFO] [stdout]     | |______________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 297 |         new_ch: &mut dyn FnMut(
[INFO] [stdout]     |                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/ser.rs:431:9
[INFO] [stdout]     |
[INFO] [stdout] 431 |         drop(write!(self.dst, "{}", t));
[INFO] [stdout]     |         ^^^^^-------------------------^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              argument has type `Result<(), std::fmt::Error>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dropping_copy_types)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 431 -         drop(write!(self.dst, "{}", t));
[INFO] [stdout] 431 +         let _ = write!(self.dst, "{}", t);
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/ser.rs:524:13
[INFO] [stdout]     |
[INFO] [stdout] 524 |             drop(write!(self.dst, "{}", key));
[INFO] [stdout]     |             ^^^^^---------------------------^
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  argument has type `Result<(), std::fmt::Error>`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 524 -             drop(write!(self.dst, "{}", key));
[INFO] [stdout] 524 +             let _ = write!(self.dst, "{}", key);
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/ser.rs:759:13
[INFO] [stdout]     |
[INFO] [stdout] 759 |             drop(write!($this.dst, "-"));
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 824 |         serialize_float!(self, v)
[INFO] [stdout]     |         -------------------------
[INFO] [stdout]     |         |
[INFO] [stdout]     |         argument has type `Result<(), std::fmt::Error>`
[INFO] [stdout]     |         in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `serialize_float` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 759 -             drop(write!($this.dst, "-"));
[INFO] [stdout] 759 +             let _ = write!($this.dst, "-");
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/ser.rs:762:13
[INFO] [stdout]     |
[INFO] [stdout] 762 |             drop(write!($this.dst, "nan"));
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 824 |         serialize_float!(self, v)
[INFO] [stdout]     |         -------------------------
[INFO] [stdout]     |         |
[INFO] [stdout]     |         argument has type `Result<(), std::fmt::Error>`
[INFO] [stdout]     |         in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `serialize_float` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 762 -             drop(write!($this.dst, "nan"));
[INFO] [stdout] 762 +             let _ = write!($this.dst, "nan");
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/ser.rs:764:13
[INFO] [stdout]     |
[INFO] [stdout] 764 |             drop(write!($this.dst, "{}", $v));
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 824 |         serialize_float!(self, v)
[INFO] [stdout]     |         -------------------------
[INFO] [stdout]     |         |
[INFO] [stdout]     |         argument has type `Result<(), std::fmt::Error>`
[INFO] [stdout]     |         in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `serialize_float` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 764 -             drop(write!($this.dst, "{}", $v));
[INFO] [stdout] 764 +             let _ = write!($this.dst, "{}", $v);
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/ser.rs:767:13
[INFO] [stdout]     |
[INFO] [stdout] 767 |             drop(write!($this.dst, ".0"));
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 824 |         serialize_float!(self, v)
[INFO] [stdout]     |         -------------------------
[INFO] [stdout]     |         |
[INFO] [stdout]     |         argument has type `Result<(), std::fmt::Error>`
[INFO] [stdout]     |         in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `serialize_float` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 767 -             drop(write!($this.dst, ".0"));
[INFO] [stdout] 767 +             let _ = write!($this.dst, ".0");
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/ser.rs:759:13
[INFO] [stdout]     |
[INFO] [stdout] 759 |             drop(write!($this.dst, "-"));
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 828 |         serialize_float!(self, v)
[INFO] [stdout]     |         -------------------------
[INFO] [stdout]     |         |
[INFO] [stdout]     |         argument has type `Result<(), std::fmt::Error>`
[INFO] [stdout]     |         in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `serialize_float` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 759 -             drop(write!($this.dst, "-"));
[INFO] [stdout] 759 +             let _ = write!($this.dst, "-");
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/ser.rs:762:13
[INFO] [stdout]     |
[INFO] [stdout] 762 |             drop(write!($this.dst, "nan"));
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 828 |         serialize_float!(self, v)
[INFO] [stdout]     |         -------------------------
[INFO] [stdout]     |         |
[INFO] [stdout]     |         argument has type `Result<(), std::fmt::Error>`
[INFO] [stdout]     |         in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `serialize_float` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 762 -             drop(write!($this.dst, "nan"));
[INFO] [stdout] 762 +             let _ = write!($this.dst, "nan");
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/ser.rs:764:13
[INFO] [stdout]     |
[INFO] [stdout] 764 |             drop(write!($this.dst, "{}", $v));
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 828 |         serialize_float!(self, v)
[INFO] [stdout]     |         -------------------------
[INFO] [stdout]     |         |
[INFO] [stdout]     |         argument has type `Result<(), std::fmt::Error>`
[INFO] [stdout]     |         in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `serialize_float` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 764 -             drop(write!($this.dst, "{}", $v));
[INFO] [stdout] 764 +             let _ = write!($this.dst, "{}", $v);
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/ser.rs:767:13
[INFO] [stdout]     |
[INFO] [stdout] 767 |             drop(write!($this.dst, ".0"));
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 828 |         serialize_float!(self, v)
[INFO] [stdout]     |         -------------------------
[INFO] [stdout]     |         |
[INFO] [stdout]     |         argument has type `Result<(), std::fmt::Error>`
[INFO] [stdout]     |         in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `serialize_float` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 767 -             drop(write!($this.dst, ".0"));
[INFO] [stdout] 767 +             let _ = write!($this.dst, ".0");
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/tokens.rs:517:30
[INFO] [stdout]     |
[INFO] [stdout] 517 |     fn into_cow(self, input: &str) -> Cow<str> {
[INFO] [stdout]     |                              ^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                              |
[INFO] [stdout]     |                              this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 517 |     fn into_cow(self, input: &str) -> Cow<'_, str> {
[INFO] [stdout]     |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "17e897136dc20504c2f490c55f8c6e12773dac6258f1bace7eb9a914eba3141f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "17e897136dc20504c2f490c55f8c6e12773dac6258f1bace7eb9a914eba3141f", kill_on_drop: false }`
[INFO] [stdout] 17e897136dc20504c2f490c55f8c6e12773dac6258f1bace7eb9a914eba3141f