[INFO] cloning repository https://github.com/makerio90/roman-numarals
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/makerio90/roman-numarals" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmakerio90%2Froman-numarals", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmakerio90%2Froman-numarals'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bf389be87b78170c6cb37c30238bb01e76012b8d
[INFO] building makerio90/roman-numarals against try#434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275 for pr-101591
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmakerio90%2Froman-numarals" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/makerio90/roman-numarals on toolchain 434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/makerio90/roman-numarals
[INFO] finished tweaking git repo https://github.com/makerio90/roman-numarals
[INFO] tweaked toml for git repo https://github.com/makerio90/roman-numarals written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/makerio90/roman-numarals already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275" "fetch" "--manifest-path" "Cargo.toml", 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:824c28ce115f6b999260af6986f3384c158e782489540e41c0b698ca1d9fd927" "/opt/rustwide/cargo-home/bin/cargo" "+434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 987c278192b9d5141c82ace19367935cdc2b9800817508a4f4ad2f6d9ce60949
[INFO] running `Command { std: "docker" "start" "-a" "987c278192b9d5141c82ace19367935cdc2b9800817508a4f4ad2f6d9ce60949", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "987c278192b9d5141c82ace19367935cdc2b9800817508a4f4ad2f6d9ce60949", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "987c278192b9d5141c82ace19367935cdc2b9800817508a4f4ad2f6d9ce60949", kill_on_drop: false }`
[INFO] [stdout] 987c278192b9d5141c82ace19367935cdc2b9800817508a4f4ad2f6d9ce60949
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:824c28ce115f6b999260af6986f3384c158e782489540e41c0b698ca1d9fd927" "/opt/rustwide/cargo-home/bin/cargo" "+434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 276032b72cebff60047bd15d89e4a54b108d5bcd572a2d0b86be106586455759
[INFO] running `Command { std: "docker" "start" "-a" "276032b72cebff60047bd15d89e4a54b108d5bcd572a2d0b86be106586455759", kill_on_drop: false }`
[INFO] [stderr]    Compiling roman-numarals v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `roman`
[INFO] [stdout]   --> src/main.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 37 |     let roman = simplify(roman);
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_roman`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.49s
[INFO] running `Command { std: "docker" "inspect" "276032b72cebff60047bd15d89e4a54b108d5bcd572a2d0b86be106586455759", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "276032b72cebff60047bd15d89e4a54b108d5bcd572a2d0b86be106586455759", kill_on_drop: false }`
[INFO] [stdout] 276032b72cebff60047bd15d89e4a54b108d5bcd572a2d0b86be106586455759
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:824c28ce115f6b999260af6986f3384c158e782489540e41c0b698ca1d9fd927" "/opt/rustwide/cargo-home/bin/cargo" "+434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bab782d01734c2845029cebdb23ee40c272b7734b30af8960b3c0bfc2b5c7205
[INFO] running `Command { std: "docker" "start" "-a" "bab782d01734c2845029cebdb23ee40c272b7734b30af8960b3c0bfc2b5c7205", kill_on_drop: false }`
[INFO] [stderr]    Compiling roman-numarals v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `roman`
[INFO] [stdout]   --> src/main.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 37 |     let roman = simplify(roman);
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_roman`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.50s
[INFO] running `Command { std: "docker" "inspect" "bab782d01734c2845029cebdb23ee40c272b7734b30af8960b3c0bfc2b5c7205", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bab782d01734c2845029cebdb23ee40c272b7734b30af8960b3c0bfc2b5c7205", kill_on_drop: false }`
[INFO] [stdout] bab782d01734c2845029cebdb23ee40c272b7734b30af8960b3c0bfc2b5c7205