[INFO] cloning repository https://github.com/lzhelyaskov/wc
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lzhelyaskov/wc" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flzhelyaskov%2Fwc", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flzhelyaskov%2Fwc'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 88fc384707ddeddb2ab9675927a49bbee13a304b
[INFO] testing lzhelyaskov/wc against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flzhelyaskov%2Fwc" "/workspace/builds/worker-29/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-29/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/lzhelyaskov/wc 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 git repo https://github.com/lzhelyaskov/wc
[INFO] finished tweaking git repo https://github.com/lzhelyaskov/wc
[INFO] tweaked toml for git repo https://github.com/lzhelyaskov/wc written to /workspace/builds/worker-29/source/Cargo.toml
[INFO] crate git repo https://github.com/lzhelyaskov/wc already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "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-29/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/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] e32f4773cb90104d09e944f75346ce1586ba11d79a02ddf9dbdda9b03bf05ca0
[INFO] running `Command { std: "docker" "start" "-a" "e32f4773cb90104d09e944f75346ce1586ba11d79a02ddf9dbdda9b03bf05ca0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e32f4773cb90104d09e944f75346ce1586ba11d79a02ddf9dbdda9b03bf05ca0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e32f4773cb90104d09e944f75346ce1586ba11d79a02ddf9dbdda9b03bf05ca0", kill_on_drop: false }`
[INFO] [stdout] e32f4773cb90104d09e944f75346ce1586ba11d79a02ddf9dbdda9b03bf05ca0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/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] 63d07e72be3d6ed516a2e78a5dd28226cce2b55ed9a26abecf1253e1b10aba4c
[INFO] running `Command { std: "docker" "start" "-a" "63d07e72be3d6ed516a2e78a5dd28226cce2b55ed9a26abecf1253e1b10aba4c", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-width v0.1.5
[INFO] [stderr]    Compiling getopts v0.2.19
[INFO] [stderr]    Compiling wc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:14:40
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub type Format = fn(WordCountVec, Box<Write>) -> Result<(), io::Error>;
[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] 14 - pub type Format = fn(WordCountVec, Box<Write>) -> Result<(), io::Error>;
[INFO] [stdout] 14 + pub type Format = fn(WordCountVec, Box<dyn Write>) -> Result<(), io::Error>;
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:294:47
[INFO] [stdout]     |
[INFO] [stdout] 294 | fn plain(items: WordCountVec, mut writer: Box<Write>) -> Result<(), io::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] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 294 - fn plain(items: WordCountVec, mut writer: Box<Write>) -> Result<(), io::Error> {
[INFO] [stdout] 294 + fn plain(items: WordCountVec, mut writer: Box<dyn Write>) -> Result<(), io::Error> {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:302:45
[INFO] [stdout]     |
[INFO] [stdout] 302 | fn csv(items: WordCountVec, mut writer: Box<Write>) -> Result<(), io::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] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 302 - fn csv(items: WordCountVec, mut writer: Box<Write>) -> Result<(), io::Error> {
[INFO] [stdout] 302 + fn csv(items: WordCountVec, mut writer: Box<dyn Write>) -> Result<(), io::Error> {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:311:46
[INFO] [stdout]     |
[INFO] [stdout] 311 | fn json(items: WordCountVec, mut writer: Box<Write>) -> Result<(), io::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] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 311 - fn json(items: WordCountVec, mut writer: Box<Write>) -> Result<(), io::Error> {
[INFO] [stdout] 311 + fn json(items: WordCountVec, mut writer: Box<dyn Write>) -> Result<(), io::Error> {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:270:21
[INFO] [stdout]     |
[INFO] [stdout] 270 |     let writer: Box<Write> = {
[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] 270 -     let writer: Box<Write> = {
[INFO] [stdout] 270 +     let writer: Box<dyn Write> = {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/main.rs:278:31
[INFO] [stdout]     |
[INFO] [stdout] 278 |                         error.description()
[INFO] [stdout]     |                               ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.93s
[INFO] running `Command { std: "docker" "inspect" "63d07e72be3d6ed516a2e78a5dd28226cce2b55ed9a26abecf1253e1b10aba4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "63d07e72be3d6ed516a2e78a5dd28226cce2b55ed9a26abecf1253e1b10aba4c", kill_on_drop: false }`
[INFO] [stdout] 63d07e72be3d6ed516a2e78a5dd28226cce2b55ed9a26abecf1253e1b10aba4c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/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] 98f03ec3203bc16e3419d966304723e4b40c7734ab74cad45dff8ee3c7a8022e
[INFO] running `Command { std: "docker" "start" "-a" "98f03ec3203bc16e3419d966304723e4b40c7734ab74cad45dff8ee3c7a8022e", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling wc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:14:40
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub type Format = fn(WordCountVec, Box<Write>) -> Result<(), io::Error>;
[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] 14 - pub type Format = fn(WordCountVec, Box<Write>) -> Result<(), io::Error>;
[INFO] [stdout] 14 + pub type Format = fn(WordCountVec, Box<dyn Write>) -> Result<(), io::Error>;
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:294:47
[INFO] [stdout]     |
[INFO] [stdout] 294 | fn plain(items: WordCountVec, mut writer: Box<Write>) -> Result<(), io::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] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 294 - fn plain(items: WordCountVec, mut writer: Box<Write>) -> Result<(), io::Error> {
[INFO] [stdout] 294 + fn plain(items: WordCountVec, mut writer: Box<dyn Write>) -> Result<(), io::Error> {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:302:45
[INFO] [stdout]     |
[INFO] [stdout] 302 | fn csv(items: WordCountVec, mut writer: Box<Write>) -> Result<(), io::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] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 302 - fn csv(items: WordCountVec, mut writer: Box<Write>) -> Result<(), io::Error> {
[INFO] [stdout] 302 + fn csv(items: WordCountVec, mut writer: Box<dyn Write>) -> Result<(), io::Error> {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:311:46
[INFO] [stdout]     |
[INFO] [stdout] 311 | fn json(items: WordCountVec, mut writer: Box<Write>) -> Result<(), io::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] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 311 - fn json(items: WordCountVec, mut writer: Box<Write>) -> Result<(), io::Error> {
[INFO] [stdout] 311 + fn json(items: WordCountVec, mut writer: Box<dyn Write>) -> Result<(), io::Error> {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:270:21
[INFO] [stdout]     |
[INFO] [stdout] 270 |     let writer: Box<Write> = {
[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] 270 -     let writer: Box<Write> = {
[INFO] [stdout] 270 +     let writer: Box<dyn Write> = {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/main.rs:278:31
[INFO] [stdout]     |
[INFO] [stdout] 278 |                         error.description()
[INFO] [stdout]     |                               ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.44s
[INFO] [stderr]   Executable unittests src/main.rs (/opt/rustwide/target/debug/deps/wc-adcd10e5df5e0641)
[INFO] running `Command { std: "docker" "inspect" "98f03ec3203bc16e3419d966304723e4b40c7734ab74cad45dff8ee3c7a8022e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98f03ec3203bc16e3419d966304723e4b40c7734ab74cad45dff8ee3c7a8022e", kill_on_drop: false }`
[INFO] [stdout] 98f03ec3203bc16e3419d966304723e4b40c7734ab74cad45dff8ee3c7a8022e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/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] 14ca0a726e615c97ccf6b8c988b2f33719df29117934df3b31cf7cbda311b615
[INFO] running `Command { std: "docker" "start" "-a" "14ca0a726e615c97ccf6b8c988b2f33719df29117934df3b31cf7cbda311b615", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:14:40
[INFO] [stderr]    |
[INFO] [stderr] 14 | pub type Format = fn(WordCountVec, Box<Write>) -> Result<(), io::Error>;
[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] 14 - pub type Format = fn(WordCountVec, Box<Write>) -> Result<(), io::Error>;
[INFO] [stderr] 14 + pub type Format = fn(WordCountVec, Box<dyn Write>) -> Result<(), io::Error>;
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:294:47
[INFO] [stderr]     |
[INFO] [stderr] 294 | fn plain(items: WordCountVec, mut writer: Box<Write>) -> Result<(), io::Error> {
[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] 294 - fn plain(items: WordCountVec, mut writer: Box<Write>) -> Result<(), io::Error> {
[INFO] [stderr] 294 + fn plain(items: WordCountVec, mut writer: Box<dyn Write>) -> Result<(), io::Error> {
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:302:45
[INFO] [stderr]     |
[INFO] [stderr] 302 | fn csv(items: WordCountVec, mut writer: Box<Write>) -> Result<(), io::Error> {
[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] 302 - fn csv(items: WordCountVec, mut writer: Box<Write>) -> Result<(), io::Error> {
[INFO] [stderr] 302 + fn csv(items: WordCountVec, mut writer: Box<dyn Write>) -> Result<(), io::Error> {
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:311:46
[INFO] [stderr]     |
[INFO] [stderr] 311 | fn json(items: WordCountVec, mut writer: Box<Write>) -> Result<(), io::Error> {
[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] 311 - fn json(items: WordCountVec, mut writer: Box<Write>) -> Result<(), io::Error> {
[INFO] [stderr] 311 + fn json(items: WordCountVec, mut writer: Box<dyn Write>) -> Result<(), io::Error> {
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:270:21
[INFO] [stderr]     |
[INFO] [stderr] 270 |     let writer: Box<Write> = {
[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] 270 -     let writer: Box<Write> = {
[INFO] [stderr] 270 +     let writer: Box<dyn Write> = {
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]    --> src/main.rs:278:31
[INFO] [stderr]     |
[INFO] [stderr] 278 |                         error.description()
[INFO] [stderr]     |                               ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `wc` (bin "wc" test) generated 6 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.22s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/wc-adcd10e5df5e0641)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[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] running `Command { std: "docker" "inspect" "14ca0a726e615c97ccf6b8c988b2f33719df29117934df3b31cf7cbda311b615", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "14ca0a726e615c97ccf6b8c988b2f33719df29117934df3b31cf7cbda311b615", kill_on_drop: false }`
[INFO] [stdout] 14ca0a726e615c97ccf6b8c988b2f33719df29117934df3b31cf7cbda311b615