[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-2022-02-22 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fneutonfoo%2Frust-maze-dfs-solver" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/neutonfoo/rust-maze-dfs-solver on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "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-7/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-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7a909159810fb1f3e60dd1425f6c40956f555552f94f08bbb459c7bf5e0e412e
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "7a909159810fb1f3e60dd1425f6c40956f555552f94f08bbb459c7bf5e0e412e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7a909159810fb1f3e60dd1425f6c40956f555552f94f08bbb459c7bf5e0e412e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a909159810fb1f3e60dd1425f6c40956f555552f94f08bbb459c7bf5e0e412e", kill_on_drop: false }`
[INFO] [stdout] 7a909159810fb1f3e60dd1425f6c40956f555552f94f08bbb459c7bf5e0e412e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 4e572ce935c13ffd729a8dcb45e661f55f23e6195132f8001035083d30cf9a5e
[INFO] running `Command { std: "docker" "start" "-a" "4e572ce935c13ffd729a8dcb45e661f55f23e6195132f8001035083d30cf9a5e", kill_on_drop: false }`
[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 1.32s
[INFO] running `Command { std: "docker" "inspect" "4e572ce935c13ffd729a8dcb45e661f55f23e6195132f8001035083d30cf9a5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e572ce935c13ffd729a8dcb45e661f55f23e6195132f8001035083d30cf9a5e", kill_on_drop: false }`
[INFO] [stdout] 4e572ce935c13ffd729a8dcb45e661f55f23e6195132f8001035083d30cf9a5e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f2a6e1c8f28aea3093b4d14f4382b7521bfa6cd21df7e9196f93759a5eeda5e2
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "f2a6e1c8f28aea3093b4d14f4382b7521bfa6cd21df7e9196f93759a5eeda5e2", kill_on_drop: false }`
[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 0.91s
[INFO] running `Command { std: "docker" "inspect" "f2a6e1c8f28aea3093b4d14f4382b7521bfa6cd21df7e9196f93759a5eeda5e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f2a6e1c8f28aea3093b4d14f4382b7521bfa6cd21df7e9196f93759a5eeda5e2", kill_on_drop: false }`
[INFO] [stdout] f2a6e1c8f28aea3093b4d14f4382b7521bfa6cd21df7e9196f93759a5eeda5e2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 81d575650d2e04c88c91f8064e383070241c83fa4cdb4340ecd56fabc6a53ab4
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "81d575650d2e04c88c91f8064e383070241c83fa4cdb4340ecd56fabc6a53ab4", kill_on_drop: false }`
[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 0.01s
[INFO] [stderr]      Running unittests (/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" "81d575650d2e04c88c91f8064e383070241c83fa4cdb4340ecd56fabc6a53ab4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "81d575650d2e04c88c91f8064e383070241c83fa4cdb4340ecd56fabc6a53ab4", kill_on_drop: false }`
[INFO] [stdout] 81d575650d2e04c88c91f8064e383070241c83fa4cdb4340ecd56fabc6a53ab4