[INFO] cloning repository https://github.com/chambaoo/rust-learning-playground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/chambaoo/rust-learning-playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchambaoo%2Frust-learning-playground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchambaoo%2Frust-learning-playground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] af7aca2c39d9429ff87eaae2c2739375e6ce9c4c
[INFO] testing chambaoo/rust-learning-playground against try#33835004928d3bf65db4d4712e1330766263b0bd for pr-155739-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchambaoo%2Frust-learning-playground" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/chambaoo/rust-learning-playground
[INFO] finished tweaking git repo https://github.com/chambaoo/rust-learning-playground
[INFO] tweaked toml for git repo https://github.com/chambaoo/rust-learning-playground written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/chambaoo/rust-learning-playground on toolchain 33835004928d3bf65db4d4712e1330766263b0bd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/chambaoo/rust-learning-playground already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1b0d7cacd44b92fc3e9036477a07675b2665d31e37f8ec17eaed38d64b4dab8f
[INFO] running `Command { std: "docker" "start" "-a" "1b0d7cacd44b92fc3e9036477a07675b2665d31e37f8ec17eaed38d64b4dab8f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1b0d7cacd44b92fc3e9036477a07675b2665d31e37f8ec17eaed38d64b4dab8f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b0d7cacd44b92fc3e9036477a07675b2665d31e37f8ec17eaed38d64b4dab8f", kill_on_drop: false }`
[INFO] [stdout] 1b0d7cacd44b92fc3e9036477a07675b2665d31e37f8ec17eaed38d64b4dab8f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3d946746593605671885378a6cad9f9d542666c6107df02945429fbcd5d4506b
[INFO] running `Command { std: "docker" "start" "-a" "3d946746593605671885378a6cad9f9d542666c6107df02945429fbcd5d4506b", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-learning-playground v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `color`
[INFO] [stdout]    --> src/main.rs:246:17
[INFO] [stdout]     |
[INFO] [stdout] 246 |     if let Some(color) = string_to_color_token("red") {
[INFO] [stdout]     |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_color`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/main.rs:123:13
[INFO] [stdout]     |
[INFO] [stdout] 123 |         Hex(String),
[INFO] [stdout]     |         --- ^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Color` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 123 -         Hex(String),
[INFO] [stdout] 123 +         Hex(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.77s
[INFO] running `Command { std: "docker" "inspect" "3d946746593605671885378a6cad9f9d542666c6107df02945429fbcd5d4506b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3d946746593605671885378a6cad9f9d542666c6107df02945429fbcd5d4506b", kill_on_drop: false }`
[INFO] [stdout] 3d946746593605671885378a6cad9f9d542666c6107df02945429fbcd5d4506b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e883bdd456d98a61fc78e372be2b99cbe51d760b5f902aa9e5e55ed0f9cc8525
[INFO] running `Command { std: "docker" "start" "-a" "e883bdd456d98a61fc78e372be2b99cbe51d760b5f902aa9e5e55ed0f9cc8525", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-learning-playground v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `color`
[INFO] [stdout]    --> src/main.rs:246:17
[INFO] [stdout]     |
[INFO] [stdout] 246 |     if let Some(color) = string_to_color_token("red") {
[INFO] [stdout]     |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_color`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.27s
[INFO] running `Command { std: "docker" "inspect" "e883bdd456d98a61fc78e372be2b99cbe51d760b5f902aa9e5e55ed0f9cc8525", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e883bdd456d98a61fc78e372be2b99cbe51d760b5f902aa9e5e55ed0f9cc8525", kill_on_drop: false }`
[INFO] [stdout] e883bdd456d98a61fc78e372be2b99cbe51d760b5f902aa9e5e55ed0f9cc8525
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 4c53686657b9c541fb49c5752e2d295eeddf99fa1209a71b054221021e91c4a7
[INFO] running `Command { std: "docker" "start" "-a" "4c53686657b9c541fb49c5752e2d295eeddf99fa1209a71b054221021e91c4a7", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `color`
[INFO] [stderr]    --> src/main.rs:246:17
[INFO] [stderr]     |
[INFO] [stderr] 246 |     if let Some(color) = string_to_color_token("red") {
[INFO] [stderr]     |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_color`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `rust-learning-playground` (bin "rust-learning-playground" test) generated 1 warning (run `cargo fix --bin "rust-learning-playground" -p rust-learning-playground --tests` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rust_learning_playground-fc61472122128538)
[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" "4c53686657b9c541fb49c5752e2d295eeddf99fa1209a71b054221021e91c4a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4c53686657b9c541fb49c5752e2d295eeddf99fa1209a71b054221021e91c4a7", kill_on_drop: false }`
[INFO] [stdout] 4c53686657b9c541fb49c5752e2d295eeddf99fa1209a71b054221021e91c4a7