[INFO] cloning repository https://github.com/branransom/chess
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/branransom/chess" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbranransom%2Fchess", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbranransom%2Fchess'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bb2c2e725a8fe5fdd3c410192484bfe1507a553a
[INFO] checking branransom/chess against master#642c19bfc3a5c1de985bf5d0cc8207ac9d22708a for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbranransom%2Fchess" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/branransom/chess
[INFO] finished tweaking git repo https://github.com/branransom/chess
[INFO] tweaked toml for git repo https://github.com/branransom/chess written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/branransom/chess on toolchain 642c19bfc3a5c1de985bf5d0cc8207ac9d22708a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/branransom/chess 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" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6cbc9e8cd43f387d5ad2d14f31c8cb13f75bfec1d07c3fc1ad44fa71b643e646
[INFO] running `Command { std: "docker" "start" "-a" "6cbc9e8cd43f387d5ad2d14f31c8cb13f75bfec1d07c3fc1ad44fa71b643e646", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6cbc9e8cd43f387d5ad2d14f31c8cb13f75bfec1d07c3fc1ad44fa71b643e646", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6cbc9e8cd43f387d5ad2d14f31c8cb13f75bfec1d07c3fc1ad44fa71b643e646", kill_on_drop: false }`
[INFO] [stdout] 6cbc9e8cd43f387d5ad2d14f31c8cb13f75bfec1d07c3fc1ad44fa71b643e646
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 04c5f26f90fe065282c80a2455b641d440324d5728084edf25c83b3deabf229b
[INFO] running `Command { std: "docker" "start" "-a" "04c5f26f90fe065282c80a2455b641d440324d5728084edf25c83b3deabf229b", kill_on_drop: false }`
[INFO] [stderr]     Checking chess-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `simple_char` is never used
[INFO] [stdout]   --> src/board.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout]  9 | impl Piece {
[INFO] [stdout]    | ---------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 14 |     fn simple_char(&self) -> &'static str {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `simple_char` is never used
[INFO] [stdout]   --> src/board.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout]  9 | impl Piece {
[INFO] [stdout]    | ---------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 14 |     fn simple_char(&self) -> &'static str {
[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 0.31s
[INFO] running `Command { std: "docker" "inspect" "04c5f26f90fe065282c80a2455b641d440324d5728084edf25c83b3deabf229b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "04c5f26f90fe065282c80a2455b641d440324d5728084edf25c83b3deabf229b", kill_on_drop: false }`
[INFO] [stdout] 04c5f26f90fe065282c80a2455b641d440324d5728084edf25c83b3deabf229b