[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 master#87788097b776f8e3662f76627944230684b671bd 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 87788097b776f8e3662f76627944230684b671bd
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+87788097b776f8e3662f76627944230684b671bd" "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" "+87788097b776f8e3662f76627944230684b671bd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "+87788097b776f8e3662f76627944230684b671bd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0c02bb151f971fb23b88d551ee528af2551db17aac01c52971e2050503bb8cb8
[INFO] running `Command { std: "docker" "start" "-a" "0c02bb151f971fb23b88d551ee528af2551db17aac01c52971e2050503bb8cb8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0c02bb151f971fb23b88d551ee528af2551db17aac01c52971e2050503bb8cb8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c02bb151f971fb23b88d551ee528af2551db17aac01c52971e2050503bb8cb8", kill_on_drop: false }`
[INFO] [stdout] 0c02bb151f971fb23b88d551ee528af2551db17aac01c52971e2050503bb8cb8
[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" "+87788097b776f8e3662f76627944230684b671bd" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 151447b02397c5deb4ba969829b5435849bf9f533b759486cab35ba48d4de9f0
[INFO] running `Command { std: "docker" "start" "-a" "151447b02397c5deb4ba969829b5435849bf9f533b759486cab35ba48d4de9f0", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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 2.39s
[INFO] running `Command { std: "docker" "inspect" "151447b02397c5deb4ba969829b5435849bf9f533b759486cab35ba48d4de9f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "151447b02397c5deb4ba969829b5435849bf9f533b759486cab35ba48d4de9f0", kill_on_drop: false }`
[INFO] [stdout] 151447b02397c5deb4ba969829b5435849bf9f533b759486cab35ba48d4de9f0
[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" "+87788097b776f8e3662f76627944230684b671bd" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1ccb9e3dbfcf45676494c65ef30f42eba5e6fa9cc641a818c078f4af536a13b8
[INFO] running `Command { std: "docker" "start" "-a" "1ccb9e3dbfcf45676494c65ef30f42eba5e6fa9cc641a818c078f4af536a13b8", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] running `Command { std: "docker" "inspect" "1ccb9e3dbfcf45676494c65ef30f42eba5e6fa9cc641a818c078f4af536a13b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ccb9e3dbfcf45676494c65ef30f42eba5e6fa9cc641a818c078f4af536a13b8", kill_on_drop: false }`
[INFO] [stdout] 1ccb9e3dbfcf45676494c65ef30f42eba5e6fa9cc641a818c078f4af536a13b8