[INFO] cloning repository https://github.com/damirm/maze-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/damirm/maze-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdamirm%2Fmaze-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdamirm%2Fmaze-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c229d99aefe1135bd8131de7d02800946c6d0e43
[INFO] checking damirm/maze-rust against c397dae808f70caebab1fc4e11b3edf7e59f58c7 for pr-158759-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdamirm%2Fmaze-rust" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/damirm/maze-rust
[INFO] finished tweaking git repo https://github.com/damirm/maze-rust
[INFO] tweaked toml for git repo https://github.com/damirm/maze-rust written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/damirm/maze-rust on toolchain c397dae808f70caebab1fc4e11b3edf7e59f58c7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c397dae808f70caebab1fc4e11b3edf7e59f58c7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/damirm/maze-rust 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" "+c397dae808f70caebab1fc4e11b3edf7e59f58c7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: Cargo.toml: unused manifest key: toolchain
[INFO] [stderr] warning: `maze-rust` (manifest) generated 1 warning
[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-1-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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@sha256:3d5ced03c013a94a2f102a4510f48a6e9184255caf5fd8244f58017bde7f5210" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 574eaaddc44e9298e516fc060a3450bf7c39c6f3f9f4359f9865e0b4ad94825c
[INFO] running `Command { std: "docker" "start" "574eaaddc44e9298e516fc060a3450bf7c39c6f3f9f4359f9865e0b4ad94825c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "574eaaddc44e9298e516fc060a3450bf7c39c6f3f9f4359f9865e0b4ad94825c", 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" "574eaaddc44e9298e516fc060a3450bf7c39c6f3f9f4359f9865e0b4ad94825c" "/opt/rustwide/cargo-home/bin/cargo" "+c397dae808f70caebab1fc4e11b3edf7e59f58c7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "574eaaddc44e9298e516fc060a3450bf7c39c6f3f9f4359f9865e0b4ad94825c", 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" "574eaaddc44e9298e516fc060a3450bf7c39c6f3f9f4359f9865e0b4ad94825c" "/opt/rustwide/cargo-home/bin/cargo" "+c397dae808f70caebab1fc4e11b3edf7e59f58c7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] warning: Cargo.toml: unused manifest key: toolchain
[INFO] [stderr] warning: `maze-rust` (manifest) generated 1 warning
[INFO] [stderr]     Checking maze-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0596]: cannot borrow data in a `&` reference as mutable
[INFO] [stdout]   --> src/maze.rs:69:47
[INFO] [stdout]    |
[INFO] [stdout] 69 |                     self.remove_walls_bettwen(&mut my_cell, neighbor);
[INFO] [stdout]    |                                               ^^^^^^^^^^^^ cannot borrow as mutable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow data in a `&` reference as mutable
[INFO] [stdout]   --> src/maze.rs:69:47
[INFO] [stdout]    |
[INFO] [stdout] 69 |                     self.remove_walls_bettwen(&mut my_cell, neighbor);
[INFO] [stdout]    |                                               ^^^^^^^^^^^^ cannot borrow as mutable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cell`
[INFO] [stdout]   --> src/maze.rs:79:41
[INFO] [stdout]    |
[INFO] [stdout] 79 |     fn random_unvisited_neighbor(&self, cell: &Cell) -> Option<&mut Cell> {
[INFO] [stdout]    |                                         ^^^^ help: if this is intentional, prefix it with an underscore: `_cell`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cell`
[INFO] [stdout]   --> src/maze.rs:79:41
[INFO] [stdout]    |
[INFO] [stdout] 79 |     fn random_unvisited_neighbor(&self, cell: &Cell) -> Option<&mut Cell> {
[INFO] [stdout]    |                                         ^^^^ help: if this is intentional, prefix it with an underscore: `_cell`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0596`.
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0596`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `maze-rust` (bin "maze-rust" test) due to 1 previous error; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `maze-rust` (bin "maze-rust") due to 1 previous error; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "574eaaddc44e9298e516fc060a3450bf7c39c6f3f9f4359f9865e0b4ad94825c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "574eaaddc44e9298e516fc060a3450bf7c39c6f3f9f4359f9865e0b4ad94825c", kill_on_drop: false }`
[INFO] [stdout] 574eaaddc44e9298e516fc060a3450bf7c39c6f3f9f4359f9865e0b4ad94825c
