[INFO] cloning repository https://github.com/languint/ferrous
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/languint/ferrous" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flanguint%2Fferrous", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flanguint%2Fferrous'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c1170e8b3e2b6e25136c5b33f638fd428bfdab32
[INFO] checking languint/ferrous against try#fa4dd1f19bfeb3fd235dc7f1406c42404436bef5 for pr-145108-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flanguint%2Fferrous" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/languint/ferrous
[INFO] finished tweaking git repo https://github.com/languint/ferrous
[INFO] tweaked toml for git repo https://github.com/languint/ferrous written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/languint/ferrous on toolchain fa4dd1f19bfeb3fd235dc7f1406c42404436bef5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+fa4dd1f19bfeb3fd235dc7f1406c42404436bef5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/languint/ferrous 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" "+fa4dd1f19bfeb3fd235dc7f1406c42404436bef5" "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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:61361fe0aef631f17e9d025a70c5a647956f8c671dd02950a60ad3f5cc5526d7" "/opt/rustwide/cargo-home/bin/cargo" "+fa4dd1f19bfeb3fd235dc7f1406c42404436bef5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 856a9dba175a8df8c29b24cde9a41dc5cb6f9fe92c38363ca4c91501b46153c5
[INFO] running `Command { std: "docker" "start" "-a" "856a9dba175a8df8c29b24cde9a41dc5cb6f9fe92c38363ca4c91501b46153c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "856a9dba175a8df8c29b24cde9a41dc5cb6f9fe92c38363ca4c91501b46153c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "856a9dba175a8df8c29b24cde9a41dc5cb6f9fe92c38363ca4c91501b46153c5", kill_on_drop: false }`
[INFO] [stdout] 856a9dba175a8df8c29b24cde9a41dc5cb6f9fe92c38363ca4c91501b46153c5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:61361fe0aef631f17e9d025a70c5a647956f8c671dd02950a60ad3f5cc5526d7" "/opt/rustwide/cargo-home/bin/cargo" "+fa4dd1f19bfeb3fd235dc7f1406c42404436bef5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6e66cedbef4e4201075643470ce9ea8fb514a49d35a4419d3189b1f5e06af052
[INFO] running `Command { std: "docker" "start" "-a" "6e66cedbef4e4201075643470ce9ea8fb514a49d35a4419d3189b1f5e06af052", kill_on_drop: false }`
[INFO] [stderr]     Checking ferrous_chess v0.1.0 (/opt/rustwide/workdir/lib/ferrous_chess)
[INFO] [stdout] warning: associated function `from_char` is never used
[INFO] [stdout]   --> lib/ferrous_chess/src/board/piece.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl Piece {
[INFO] [stdout]    | ---------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 19 |     fn from_char(piece_char: char) -> Piece {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.14s
[INFO] running `Command { std: "docker" "inspect" "6e66cedbef4e4201075643470ce9ea8fb514a49d35a4419d3189b1f5e06af052", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e66cedbef4e4201075643470ce9ea8fb514a49d35a4419d3189b1f5e06af052", kill_on_drop: false }`
[INFO] [stdout] 6e66cedbef4e4201075643470ce9ea8fb514a49d35a4419d3189b1f5e06af052