[INFO] fetching crate counters 0.5.0...
[INFO] testing counters-0.5.0 against beta-2022-04-10 for beta-1.61-1
[INFO] extracting crate counters 0.5.0 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate counters 0.5.0 on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate counters 0.5.0
[INFO] finished tweaking crates.io crate counters 0.5.0
[INFO] tweaked toml for crates.io crate counters 0.5.0 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f8341e290a4e6a5507e65f320b0dedbf858b7929f09c5859d565d4893aa64c04
[INFO] running `Command { std: "docker" "start" "-a" "f8341e290a4e6a5507e65f320b0dedbf858b7929f09c5859d565d4893aa64c04", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f8341e290a4e6a5507e65f320b0dedbf858b7929f09c5859d565d4893aa64c04", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f8341e290a4e6a5507e65f320b0dedbf858b7929f09c5859d565d4893aa64c04", kill_on_drop: false }`
[INFO] [stdout] f8341e290a4e6a5507e65f320b0dedbf858b7929f09c5859d565d4893aa64c04
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3e6e34e8c38264d09093963c18eefe3e595ef8c0336cf76cebfe464f1a298873
[INFO] running `Command { std: "docker" "start" "-a" "3e6e34e8c38264d09093963c18eefe3e595ef8c0336cf76cebfe464f1a298873", kill_on_drop: false }`
[INFO] [stderr]    Compiling fxhash v0.2.1
[INFO] [stderr]    Compiling counters v0.5.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/counters.rs:86:60
[INFO] [stdout]    |
[INFO] [stdout] 86 |     pub fn print<F: Filter>(&self, mut filter: F, to: &mut io::Write) -> io::Result<()> {
[INFO] [stdout]    |                                                            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[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] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 86 -     pub fn print<F: Filter>(&self, mut filter: F, to: &mut io::Write) -> io::Result<()> {
[INFO] [stdout] 86 +     pub fn print<F: Filter>(&self, mut filter: F, to: &mut dyn io::Write) -> io::Result<()> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/table.rs:65:34
[INFO] [stdout]    |
[INFO] [stdout] 65 |     pub fn print(&self, to: &mut io::Write) -> io::Result<()> {
[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] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 65 -     pub fn print(&self, to: &mut io::Write) -> io::Result<()> {
[INFO] [stdout] 65 +     pub fn print(&self, to: &mut dyn io::Write) -> io::Result<()> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/noop.rs:17:69
[INFO] [stdout]    |
[INFO] [stdout] 17 |     #[inline] pub fn print<F: Filter>(&self, _filter: F, _out: &mut io::Write) -> io::Result<()> { Ok(()) }
[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] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 17 -     #[inline] pub fn print<F: Filter>(&self, _filter: F, _out: &mut io::Write) -> io::Result<()> { Ok(()) }
[INFO] [stdout] 17 +     #[inline] pub fn print<F: Filter>(&self, _filter: F, _out: &mut dyn io::Write) -> io::Result<()> { Ok(()) }
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/noop.rs:27:45
[INFO] [stdout]    |
[INFO] [stdout] 27 |     #[inline] pub fn print(&self, _to: &mut io::Write) -> io::Result<()> { Ok(()) }
[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] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 27 -     #[inline] pub fn print(&self, _to: &mut io::Write) -> io::Result<()> { Ok(()) }
[INFO] [stdout] 27 +     #[inline] pub fn print(&self, _to: &mut dyn io::Write) -> io::Result<()> { Ok(()) }
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.95s
[INFO] running `Command { std: "docker" "inspect" "3e6e34e8c38264d09093963c18eefe3e595ef8c0336cf76cebfe464f1a298873", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e6e34e8c38264d09093963c18eefe3e595ef8c0336cf76cebfe464f1a298873", kill_on_drop: false }`
[INFO] [stdout] 3e6e34e8c38264d09093963c18eefe3e595ef8c0336cf76cebfe464f1a298873
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 813a7d46c753282607969756ffe310e469897cf666e46c58ba1aba6ad89b56e7
[INFO] running `Command { std: "docker" "start" "-a" "813a7d46c753282607969756ffe310e469897cf666e46c58ba1aba6ad89b56e7", kill_on_drop: false }`
[INFO] [stderr]    Compiling counters v0.5.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/counters.rs:86:60
[INFO] [stdout]    |
[INFO] [stdout] 86 |     pub fn print<F: Filter>(&self, mut filter: F, to: &mut io::Write) -> io::Result<()> {
[INFO] [stdout]    |                                                            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[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] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 86 -     pub fn print<F: Filter>(&self, mut filter: F, to: &mut io::Write) -> io::Result<()> {
[INFO] [stdout] 86 +     pub fn print<F: Filter>(&self, mut filter: F, to: &mut dyn io::Write) -> io::Result<()> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/table.rs:65:34
[INFO] [stdout]    |
[INFO] [stdout] 65 |     pub fn print(&self, to: &mut io::Write) -> io::Result<()> {
[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] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 65 -     pub fn print(&self, to: &mut io::Write) -> io::Result<()> {
[INFO] [stdout] 65 +     pub fn print(&self, to: &mut dyn io::Write) -> io::Result<()> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/noop.rs:17:69
[INFO] [stdout]    |
[INFO] [stdout] 17 |     #[inline] pub fn print<F: Filter>(&self, _filter: F, _out: &mut io::Write) -> io::Result<()> { Ok(()) }
[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] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 17 -     #[inline] pub fn print<F: Filter>(&self, _filter: F, _out: &mut io::Write) -> io::Result<()> { Ok(()) }
[INFO] [stdout] 17 +     #[inline] pub fn print<F: Filter>(&self, _filter: F, _out: &mut dyn io::Write) -> io::Result<()> { Ok(()) }
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/noop.rs:27:45
[INFO] [stdout]    |
[INFO] [stdout] 27 |     #[inline] pub fn print(&self, _to: &mut io::Write) -> io::Result<()> { Ok(()) }
[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] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 27 -     #[inline] pub fn print(&self, _to: &mut io::Write) -> io::Result<()> { Ok(()) }
[INFO] [stdout] 27 +     #[inline] pub fn print(&self, _to: &mut dyn io::Write) -> io::Result<()> { Ok(()) }
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/counters.rs:86:60
[INFO] [stdout]    |
[INFO] [stdout] 86 |     pub fn print<F: Filter>(&self, mut filter: F, to: &mut io::Write) -> io::Result<()> {
[INFO] [stdout]    |                                                            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[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] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 86 -     pub fn print<F: Filter>(&self, mut filter: F, to: &mut io::Write) -> io::Result<()> {
[INFO] [stdout] 86 +     pub fn print<F: Filter>(&self, mut filter: F, to: &mut dyn io::Write) -> io::Result<()> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/table.rs:65:34
[INFO] [stdout]    |
[INFO] [stdout] 65 |     pub fn print(&self, to: &mut io::Write) -> io::Result<()> {
[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] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 65 -     pub fn print(&self, to: &mut io::Write) -> io::Result<()> {
[INFO] [stdout] 65 +     pub fn print(&self, to: &mut dyn io::Write) -> io::Result<()> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/noop.rs:17:69
[INFO] [stdout]    |
[INFO] [stdout] 17 |     #[inline] pub fn print<F: Filter>(&self, _filter: F, _out: &mut io::Write) -> io::Result<()> { Ok(()) }
[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] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 17 -     #[inline] pub fn print<F: Filter>(&self, _filter: F, _out: &mut io::Write) -> io::Result<()> { Ok(()) }
[INFO] [stdout] 17 +     #[inline] pub fn print<F: Filter>(&self, _filter: F, _out: &mut dyn io::Write) -> io::Result<()> { Ok(()) }
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/noop.rs:27:45
[INFO] [stdout]    |
[INFO] [stdout] 27 |     #[inline] pub fn print(&self, _to: &mut io::Write) -> io::Result<()> { Ok(()) }
[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] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 27 -     #[inline] pub fn print(&self, _to: &mut io::Write) -> io::Result<()> { Ok(()) }
[INFO] [stdout] 27 +     #[inline] pub fn print(&self, _to: &mut dyn io::Write) -> io::Result<()> { Ok(()) }
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.74s
[INFO] [stderr]   Executable unittests src/lib.rs (/opt/rustwide/target/debug/deps/counters-dde5371a0bdbd7e2)
[INFO] running `Command { std: "docker" "inspect" "813a7d46c753282607969756ffe310e469897cf666e46c58ba1aba6ad89b56e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "813a7d46c753282607969756ffe310e469897cf666e46c58ba1aba6ad89b56e7", kill_on_drop: false }`
[INFO] [stdout] 813a7d46c753282607969756ffe310e469897cf666e46c58ba1aba6ad89b56e7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 2d7eae7eee84e16f0d42d0add4fbcdc87cb7d822c55c72fbbe44c33cb2343ae9
[INFO] running `Command { std: "docker" "start" "-a" "2d7eae7eee84e16f0d42d0add4fbcdc87cb7d822c55c72fbbe44c33cb2343ae9", kill_on_drop: false }`
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/counters.rs:86:60
[INFO] [stderr]    |
[INFO] [stderr] 86 |     pub fn print<F: Filter>(&self, mut filter: F, to: &mut io::Write) -> io::Result<()> {
[INFO] [stderr]    |                                                            ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 86 -     pub fn print<F: Filter>(&self, mut filter: F, to: &mut io::Write) -> io::Result<()> {
[INFO] [stderr] 86 +     pub fn print<F: Filter>(&self, mut filter: F, to: &mut dyn io::Write) -> io::Result<()> {
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/table.rs:65:34
[INFO] [stderr]    |
[INFO] [stderr] 65 |     pub fn print(&self, to: &mut io::Write) -> io::Result<()> {
[INFO] [stderr]    |                                  ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 65 -     pub fn print(&self, to: &mut io::Write) -> io::Result<()> {
[INFO] [stderr] 65 +     pub fn print(&self, to: &mut dyn io::Write) -> io::Result<()> {
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout] 
[INFO] [stderr]   --> src/noop.rs:17:69
[INFO] [stdout] running 2 tests
[INFO] [stderr]    |
[INFO] [stdout] test noop ... ok
[INFO] [stderr] 17 |     #[inline] pub fn print<F: Filter>(&self, _filter: F, _out: &mut io::Write) -> io::Result<()> { Ok(()) }
[INFO] [stdout] test it_works ... ok
[INFO] [stderr]    |                                                                     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stderr]    |
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout] 
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 17 -     #[inline] pub fn print<F: Filter>(&self, _filter: F, _out: &mut io::Write) -> io::Result<()> { Ok(()) }
[INFO] [stderr] 17 +     #[inline] pub fn print<F: Filter>(&self, _filter: F, _out: &mut dyn io::Write) -> io::Result<()> { Ok(()) }
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/noop.rs:27:45
[INFO] [stderr]    |
[INFO] [stderr] 27 |     #[inline] pub fn print(&self, _to: &mut io::Write) -> io::Result<()> { Ok(()) }
[INFO] [stderr]    |                                             ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 27 -     #[inline] pub fn print(&self, _to: &mut io::Write) -> io::Result<()> { Ok(()) }
[INFO] [stderr] 27 +     #[inline] pub fn print(&self, _to: &mut dyn io::Write) -> io::Result<()> { Ok(()) }
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: `counters` (lib) generated 4 warnings
[INFO] [stderr] warning: `counters` (lib test) generated 4 warnings (4 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/counters-dde5371a0bdbd7e2)
[INFO] [stderr]    Doc-tests counters
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - (line 38) ... ok
[INFO] [stdout] test src/table.rs - table::Table (line 10) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.41s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "2d7eae7eee84e16f0d42d0add4fbcdc87cb7d822c55c72fbbe44c33cb2343ae9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2d7eae7eee84e16f0d42d0add4fbcdc87cb7d822c55c72fbbe44c33cb2343ae9", kill_on_drop: false }`
[INFO] [stdout] 2d7eae7eee84e16f0d42d0add4fbcdc87cb7d822c55c72fbbe44c33cb2343ae9