[INFO] cloning repository https://github.com/ivan-kapelyukh/arro
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ivan-kapelyukh/arro" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fivan-kapelyukh%2Farro", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fivan-kapelyukh%2Farro'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bf002da216f4762406e0349882a1217bdcae4545
[INFO] checking ivan-kapelyukh/arro/bf002da216f4762406e0349882a1217bdcae4545 against master#e1613686e0efc80a1a18b1263625450a8de3fb04 for pr-154492
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fivan-kapelyukh%2Farro" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/ivan-kapelyukh/arro
[INFO] finished tweaking git repo https://github.com/ivan-kapelyukh/arro
[INFO] tweaked toml for git repo https://github.com/ivan-kapelyukh/arro written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ivan-kapelyukh/arro on toolchain e1613686e0efc80a1a18b1263625450a8de3fb04
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e1613686e0efc80a1a18b1263625450a8de3fb04" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ivan-kapelyukh/arro 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" "+e1613686e0efc80a1a18b1263625450a8de3fb04" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+e1613686e0efc80a1a18b1263625450a8de3fb04" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dc352537a6c7cf64a89522099f347b106fd6cf73d0b332a9decaae22159fe259
[INFO] running `Command { std: "docker" "start" "-a" "dc352537a6c7cf64a89522099f347b106fd6cf73d0b332a9decaae22159fe259", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dc352537a6c7cf64a89522099f347b106fd6cf73d0b332a9decaae22159fe259", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dc352537a6c7cf64a89522099f347b106fd6cf73d0b332a9decaae22159fe259", kill_on_drop: false }`
[INFO] [stdout] dc352537a6c7cf64a89522099f347b106fd6cf73d0b332a9decaae22159fe259
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+e1613686e0efc80a1a18b1263625450a8de3fb04" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9e6c40c8edc5edf6f77315c3efc363c94e2e11a0333213ae265a6557a2aefb84
[INFO] running `Command { std: "docker" "start" "-a" "9e6c40c8edc5edf6f77315c3efc363c94e2e11a0333213ae265a6557a2aefb84", kill_on_drop: false }`
[INFO] [stderr]     Checking arro v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/ttt/minimax.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     for mut m in &mut valid_moves {
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/ttt/minimax.rs:60:9
[INFO] [stdout]    |
[INFO] [stdout] 60 |     for mut m in &mut valid_moves {
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Piece` is never used
[INFO] [stdout]  --> src/piece.rs:3:11
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub trait Piece: Display + Default {}
[INFO] [stdout]   |           ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/ttt/minimax.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     for mut m in &mut valid_moves {
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/ttt/minimax.rs:60:9
[INFO] [stdout]    |
[INFO] [stdout] 60 |     for mut m in &mut valid_moves {
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Piece` is never used
[INFO] [stdout]  --> src/piece.rs:3:11
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub trait Piece: Display + Default {}
[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" "9e6c40c8edc5edf6f77315c3efc363c94e2e11a0333213ae265a6557a2aefb84", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e6c40c8edc5edf6f77315c3efc363c94e2e11a0333213ae265a6557a2aefb84", kill_on_drop: false }`
[INFO] [stdout] 9e6c40c8edc5edf6f77315c3efc363c94e2e11a0333213ae265a6557a2aefb84