[INFO] cloning repository https://github.com/totally-real-penguin/rust-sokoban
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/totally-real-penguin/rust-sokoban" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftotally-real-penguin%2Frust-sokoban", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftotally-real-penguin%2Frust-sokoban'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d85304e3c028ef85363779bceaffb032b8f43cfb
[INFO] checking totally-real-penguin/rust-sokoban against master#b56aaec52bc0fa35591a872fb4aac81f606e265c for pr-122661-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftotally-real-penguin%2Frust-sokoban" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/totally-real-penguin/rust-sokoban
[INFO] finished tweaking git repo https://github.com/totally-real-penguin/rust-sokoban
[INFO] tweaked toml for git repo https://github.com/totally-real-penguin/rust-sokoban written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/totally-real-penguin/rust-sokoban on toolchain b56aaec52bc0fa35591a872fb4aac81f606e265c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b56aaec52bc0fa35591a872fb4aac81f606e265c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/totally-real-penguin/rust-sokoban 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" "+b56aaec52bc0fa35591a872fb4aac81f606e265c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+b56aaec52bc0fa35591a872fb4aac81f606e265c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2ed69ef226dcbcebd495485e4082cca96ff7905aa77dc1c0c90adda5a1f63a8d
[INFO] running `Command { std: "docker" "start" "-a" "2ed69ef226dcbcebd495485e4082cca96ff7905aa77dc1c0c90adda5a1f63a8d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2ed69ef226dcbcebd495485e4082cca96ff7905aa77dc1c0c90adda5a1f63a8d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2ed69ef226dcbcebd495485e4082cca96ff7905aa77dc1c0c90adda5a1f63a8d", kill_on_drop: false }`
[INFO] [stdout] 2ed69ef226dcbcebd495485e4082cca96ff7905aa77dc1c0c90adda5a1f63a8d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+b56aaec52bc0fa35591a872fb4aac81f606e265c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3150d3d5606b7072793aed38c7704d2aaa96d304a6828ce27cd245deae6ec12f
[INFO] running `Command { std: "docker" "start" "-a" "3150d3d5606b7072793aed38c7704d2aaa96d304a6828ce27cd245deae6ec12f", kill_on_drop: false }`
[INFO] [stderr]     Checking sokobon v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `grid`
[INFO] [stdout]  --> sokobon.rs:3:13
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let mut grid: [[char;8];8] = [
[INFO] [stdout]   |             ^^^^ help: if this is intentional, prefix it with an underscore: `_grid`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> sokobon.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let mut grid: [[char;8];8] = [
[INFO] [stdout]   |         ----^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `grid`
[INFO] [stdout]  --> sokobon.rs:3:13
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let mut grid: [[char;8];8] = [
[INFO] [stdout]   |             ^^^^ help: if this is intentional, prefix it with an underscore: `_grid`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> sokobon.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let mut grid: [[char;8];8] = [
[INFO] [stdout]   |         ----^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> sokobon.rs:2:4
[INFO] [stdout]   |
[INFO] [stdout] 2 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.29s
[INFO] running `Command { std: "docker" "inspect" "3150d3d5606b7072793aed38c7704d2aaa96d304a6828ce27cd245deae6ec12f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3150d3d5606b7072793aed38c7704d2aaa96d304a6828ce27cd245deae6ec12f", kill_on_drop: false }`
[INFO] [stdout] 3150d3d5606b7072793aed38c7704d2aaa96d304a6828ce27cd245deae6ec12f