[INFO] updating cached repository ikazuya0201/maze_solver
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ikazuya0201/maze_solver
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ikazuya0201/maze_solver" "work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/gh/ikazuya0201/maze_solver"`
[INFO] [stderr] Cloning into 'work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/gh/ikazuya0201/maze_solver'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ikazuya0201/maze_solver" "work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/gh/ikazuya0201/maze_solver"`
[INFO] [stderr] Cloning into 'work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/gh/ikazuya0201/maze_solver'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 581124df224ff289298d4d087bdf9f796ffbb701
[INFO] sha for GitHub repo ikazuya0201/maze_solver: 581124df224ff289298d4d087bdf9f796ffbb701
[INFO] validating manifest of ikazuya0201/maze_solver on toolchain master#e305df1846a6d985315917ae0c81b74af8b4e641
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of ikazuya0201/maze_solver on toolchain try#99a7498759a22b5684caf798a98b7e90ad9d2443
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+99a7498759a22b5684caf798a98b7e90ad9d2443-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing ikazuya0201/maze_solver
[INFO] finished frobbing ikazuya0201/maze_solver
[INFO] frobbed toml for ikazuya0201/maze_solver written to work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/gh/ikazuya0201/maze_solver/Cargo.toml
[INFO] started frobbing ikazuya0201/maze_solver
[INFO] finished frobbing ikazuya0201/maze_solver
[INFO] frobbed toml for ikazuya0201/maze_solver written to work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/gh/ikazuya0201/maze_solver/Cargo.toml
[INFO] crate ikazuya0201/maze_solver already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+99a7498759a22b5684caf798a98b7e90ad9d2443-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking ikazuya0201/maze_solver against master#e305df1846a6d985315917ae0c81b74af8b4e641 for pr-60039-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-60039-1/worker-7/master#e305df1846a6d985315917ae0c81b74af8b4e641:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/gh/ikazuya0201/maze_solver:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 6ecb913bde21fc3f7f00aab2cba905724bd83699960d29af7b1c7d82c84d4f47
[INFO] running `"docker" "start" "-a" "6ecb913bde21fc3f7f00aab2cba905724bd83699960d29af7b1c7d82c84d4f47"`
[INFO] [stderr]     Checking hash32 v0.1.0
[INFO] [stderr]     Checking heapless v0.4.2
[INFO] [stderr]     Checking maze_solver v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: the item `Direction` is imported redundantly
[INFO] [stderr]   --> src/solver/maze.rs:64:13
[INFO] [stderr]    |
[INFO] [stderr] 3  | pub use square::Direction;
[INFO] [stderr]    |         ----------------- the item `Direction` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 64 |         use square::Direction;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the item `Direction` is imported redundantly
[INFO] [stderr]   --> src/solver/maze.rs:85:13
[INFO] [stderr]    |
[INFO] [stderr] 3  | pub use square::Direction;
[INFO] [stderr]    |         ----------------- the item `Direction` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 85 |         use square::Direction;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the item `Direction` is imported redundantly
[INFO] [stderr]    --> src/solver/maze.rs:111:13
[INFO] [stderr]     |
[INFO] [stderr] 3   | pub use square::Direction;
[INFO] [stderr]     |         ----------------- the item `Direction` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 111 |         use square::Direction;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the item `Direction` is imported redundantly
[INFO] [stderr]    --> src/solver/maze.rs:150:13
[INFO] [stderr]     |
[INFO] [stderr] 3   | pub use square::Direction;
[INFO] [stderr]     |         ----------------- the item `Direction` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 150 |         use square::Direction;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `core::result::Result` that must be used
[INFO] [stderr]    --> src/solver/maze.rs:122:13
[INFO] [stderr]     |
[INFO] [stderr] 122 |             queue.enqueue(goal);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `core::result::Result` that must be used
[INFO] [stderr]    --> src/solver/maze.rs:140:17
[INFO] [stderr]     |
[INFO] [stderr] 140 |                 queue.enqueue(nn);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.48s
[INFO] running `"docker" "inspect" "6ecb913bde21fc3f7f00aab2cba905724bd83699960d29af7b1c7d82c84d4f47"`
[INFO] running `"docker" "rm" "-f" "6ecb913bde21fc3f7f00aab2cba905724bd83699960d29af7b1c7d82c84d4f47"`
[INFO] [stdout] 6ecb913bde21fc3f7f00aab2cba905724bd83699960d29af7b1c7d82c84d4f47