[INFO] cloning repository https://github.com/neutonfoo/rust-maze-dfs-solver
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/neutonfoo/rust-maze-dfs-solver" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fneutonfoo%2Frust-maze-dfs-solver", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fneutonfoo%2Frust-maze-dfs-solver'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8df3dfe8fbda26919fc0e7fa299f4718eb6bf9eb
[INFO] testing neutonfoo/rust-maze-dfs-solver against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fneutonfoo%2Frust-maze-dfs-solver" "/workspace/builds/worker-75/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-75/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/neutonfoo/rust-maze-dfs-solver on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/neutonfoo/rust-maze-dfs-solver
[INFO] finished tweaking git repo https://github.com/neutonfoo/rust-maze-dfs-solver
[INFO] tweaked toml for git repo https://github.com/neutonfoo/rust-maze-dfs-solver written to /workspace/builds/worker-75/source/Cargo.toml
[INFO] crate git repo https://github.com/neutonfoo/rust-maze-dfs-solver already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-75/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-75/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] afefff7cb5d2db19276276eb27108b486ab8c0a8b5db3062117fce14ee48d1f6
[INFO] running `Command { std: "docker" "start" "-a" "afefff7cb5d2db19276276eb27108b486ab8c0a8b5db3062117fce14ee48d1f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "afefff7cb5d2db19276276eb27108b486ab8c0a8b5db3062117fce14ee48d1f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "afefff7cb5d2db19276276eb27108b486ab8c0a8b5db3062117fce14ee48d1f6", kill_on_drop: false }`
[INFO] [stdout] afefff7cb5d2db19276276eb27108b486ab8c0a8b5db3062117fce14ee48d1f6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-75/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-75/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d930680c5f37165a09728066e472fd463fe0a51d868debc38945e65167b4d535
[INFO] running `Command { std: "docker" "start" "-a" "d930680c5f37165a09728066e472fd463fe0a51d868debc38945e65167b4d535", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rust-maze-dfs-solver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `visited`
[INFO] [stdout]   --> src/maze.rs:22:3
[INFO] [stdout]    |
[INFO] [stdout] 22 |   visited: HashSet<Point>,
[INFO] [stdout]    |   ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] note: `Maze` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/maze.rs:17:10
[INFO] [stdout]    |
[INFO] [stdout] 17 | #[derive(Debug)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.24s
[INFO] running `Command { std: "docker" "inspect" "d930680c5f37165a09728066e472fd463fe0a51d868debc38945e65167b4d535", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d930680c5f37165a09728066e472fd463fe0a51d868debc38945e65167b4d535", kill_on_drop: false }`
[INFO] [stdout] d930680c5f37165a09728066e472fd463fe0a51d868debc38945e65167b4d535
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-75/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-75/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bd024dbcf29f13a7296a622a12b14d3ebdb4424d9065538d73582f49fe0c4159
[INFO] running `Command { std: "docker" "start" "-a" "bd024dbcf29f13a7296a622a12b14d3ebdb4424d9065538d73582f49fe0c4159", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rust-maze-dfs-solver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `visited`
[INFO] [stdout]   --> src/maze.rs:22:3
[INFO] [stdout]    |
[INFO] [stdout] 22 |   visited: HashSet<Point>,
[INFO] [stdout]    |   ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] note: `Maze` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/maze.rs:17:10
[INFO] [stdout]    |
[INFO] [stdout] 17 | #[derive(Debug)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 9.22s
[INFO] [stderr]   Executable unittests src/main.rs (/opt/rustwide/target/debug/deps/rust_maze_dfs_solver-7881d3a4d28ab646)
[INFO] running `Command { std: "docker" "inspect" "bd024dbcf29f13a7296a622a12b14d3ebdb4424d9065538d73582f49fe0c4159", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd024dbcf29f13a7296a622a12b14d3ebdb4424d9065538d73582f49fe0c4159", kill_on_drop: false }`
[INFO] [stdout] bd024dbcf29f13a7296a622a12b14d3ebdb4424d9065538d73582f49fe0c4159
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-75/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-75/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 2175085d64eeeeafc109d1c785cb43c0521b7757ec37485b153c22750ef5769f
[INFO] running `Command { std: "docker" "start" "-a" "2175085d64eeeeafc109d1c785cb43c0521b7757ec37485b153c22750ef5769f", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: field is never read: `visited`
[INFO] [stderr]   --> src/maze.rs:22:3
[INFO] [stderr]    |
[INFO] [stderr] 22 |   visited: HashSet<Point>,
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] note: `Maze` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]   --> src/maze.rs:17:10
[INFO] [stderr]    |
[INFO] [stderr] 17 | #[derive(Debug)]
[INFO] [stderr]    |          ^^^^^
[INFO] [stderr]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: `rust-maze-dfs-solver` (bin "rust-maze-dfs-solver" test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rust_maze_dfs_solver-7881d3a4d28ab646)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "2175085d64eeeeafc109d1c785cb43c0521b7757ec37485b153c22750ef5769f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2175085d64eeeeafc109d1c785cb43c0521b7757ec37485b153c22750ef5769f", kill_on_drop: false }`
[INFO] [stdout] 2175085d64eeeeafc109d1c785cb43c0521b7757ec37485b153c22750ef5769f