[INFO] cloning repository https://github.com/FurlanV/backtracking-maze-solver
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/FurlanV/backtracking-maze-solver" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFurlanV%2Fbacktracking-maze-solver", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFurlanV%2Fbacktracking-maze-solver'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fddd292fffb36df45d9d14fefe1be35d578e02a1
[INFO] checking FurlanV/backtracking-maze-solver against 011c518242557d21690f7936b5812318dc2fec47 for pr-159877
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFurlanV%2Fbacktracking-maze-solver" "/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/FurlanV/backtracking-maze-solver
[INFO] finished tweaking git repo https://github.com/FurlanV/backtracking-maze-solver
[INFO] tweaked toml for git repo https://github.com/FurlanV/backtracking-maze-solver written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/FurlanV/backtracking-maze-solver on toolchain 011c518242557d21690f7936b5812318dc2fec47
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+011c518242557d21690f7936b5812318dc2fec47" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/FurlanV/backtracking-maze-solver 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" "+011c518242557d21690f7936b5812318dc2fec47" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded getrandom v0.2.6
[INFO] [stderr]   Downloaded libc v0.2.125
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:1fa6594d87c8fa7b311925a7a77a16f539833322d9dfba4ce891f211db2f90b1" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 3632168afc7d759b5a9ef00e43e075816cbd10e552129943470b1b5f157806b6
[INFO] running `Command { std: "docker" "start" "3632168afc7d759b5a9ef00e43e075816cbd10e552129943470b1b5f157806b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3632168afc7d759b5a9ef00e43e075816cbd10e552129943470b1b5f157806b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "3632168afc7d759b5a9ef00e43e075816cbd10e552129943470b1b5f157806b6" "/opt/rustwide/cargo-home/bin/cargo" "+011c518242557d21690f7936b5812318dc2fec47" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3632168afc7d759b5a9ef00e43e075816cbd10e552129943470b1b5f157806b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "3632168afc7d759b5a9ef00e43e075816cbd10e552129943470b1b5f157806b6" "/opt/rustwide/cargo-home/bin/cargo" "+011c518242557d21690f7936b5812318dc2fec47" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.125
[INFO] [stderr]     Checking ppv-lite86 v0.2.16
[INFO] [stderr]     Checking getrandom v0.2.6
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking backtracking-maze v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `dead_end` is never read
[INFO] [stdout]    --> src/maze/agent.rs:137:38
[INFO] [stdout]     |
[INFO] [stdout] 137 |               let mut dead_end: bool = false;
[INFO] [stdout]     |                                        ^^^^^ this value is reassigned later and never used
[INFO] [stdout] 138 |
[INFO] [stdout] 139 | /             dead_end = possibilities
[INFO] [stdout] 140 | |                 .iter()
[INFO] [stdout] 141 | |                 .all(|p| *p == MovementPossibilities::DeadEnd);
[INFO] [stdout]     | |______________________________________________________________- `dead_end` is overwritten here before the previous value is read
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `dead_end` is never read
[INFO] [stdout]    --> src/maze/agent.rs:137:38
[INFO] [stdout]     |
[INFO] [stdout] 137 |               let mut dead_end: bool = false;
[INFO] [stdout]     |                                        ^^^^^ this value is reassigned later and never used
[INFO] [stdout] 138 |
[INFO] [stdout] 139 | /             dead_end = possibilities
[INFO] [stdout] 140 | |                 .iter()
[INFO] [stdout] 141 | |                 .all(|p| *p == MovementPossibilities::DeadEnd);
[INFO] [stdout]     | |______________________________________________________________- `dead_end` is overwritten here before the previous value is read
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.57s
[INFO] running `Command { std: "docker" "inspect" "3632168afc7d759b5a9ef00e43e075816cbd10e552129943470b1b5f157806b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3632168afc7d759b5a9ef00e43e075816cbd10e552129943470b1b5f157806b6", kill_on_drop: false }`
[INFO] [stdout] 3632168afc7d759b5a9ef00e43e075816cbd10e552129943470b1b5f157806b6
