[INFO] cloning repository https://github.com/r4f4/game-fifteen-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/r4f4/game-fifteen-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fr4f4%2Fgame-fifteen-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fr4f4%2Fgame-fifteen-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 28bd9185d765337fb7c6aee0d9d33ab21f7d4d22
[INFO] testing r4f4/game-fifteen-rs against 1.49.0 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fr4f4%2Fgame-fifteen-rs" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/r4f4/game-fifteen-rs on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/r4f4/game-fifteen-rs
[INFO] finished tweaking git repo https://github.com/r4f4/game-fifteen-rs
[INFO] tweaked toml for git repo https://github.com/r4f4/game-fifteen-rs written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/r4f4/game-fifteen-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0d486e641671980357a3d1d97ce53c125830f5cef81851faf65dba5fe5e35135
[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" "0d486e641671980357a3d1d97ce53c125830f5cef81851faf65dba5fe5e35135", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0d486e641671980357a3d1d97ce53c125830f5cef81851faf65dba5fe5e35135", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d486e641671980357a3d1d97ce53c125830f5cef81851faf65dba5fe5e35135", kill_on_drop: false }`
[INFO] [stdout] 0d486e641671980357a3d1d97ce53c125830f5cef81851faf65dba5fe5e35135
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a26e6937d36ac262b56343863a838faaa9cd4d559cebb9220fd4f211698b966d
[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" "a26e6937d36ac262b56343863a838faaa9cd4d559cebb9220fd4f211698b966d", kill_on_drop: false }`
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.1
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling game15 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/solver.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |         ((diff / 4) + (diff % 4)) // # of rows + cols to move
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 18.88s
[INFO] running `Command { std: "docker" "inspect" "a26e6937d36ac262b56343863a838faaa9cd4d559cebb9220fd4f211698b966d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a26e6937d36ac262b56343863a838faaa9cd4d559cebb9220fd4f211698b966d", kill_on_drop: false }`
[INFO] [stdout] a26e6937d36ac262b56343863a838faaa9cd4d559cebb9220fd4f211698b966d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c1cf86c335920c9996a991875849006f4e9dbeeedf63a278b438100d493bf53c
[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" "c1cf86c335920c9996a991875849006f4e9dbeeedf63a278b438100d493bf53c", kill_on_drop: false }`
[INFO] [stderr]    Compiling game15 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/solver.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |         ((diff / 4) + (diff % 4)) // # of rows + cols to move
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/solver.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |         ((diff / 4) + (diff % 4)) // # of rows + cols to move
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.50s
[INFO] running `Command { std: "docker" "inspect" "c1cf86c335920c9996a991875849006f4e9dbeeedf63a278b438100d493bf53c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c1cf86c335920c9996a991875849006f4e9dbeeedf63a278b438100d493bf53c", kill_on_drop: false }`
[INFO] [stdout] c1cf86c335920c9996a991875849006f4e9dbeeedf63a278b438100d493bf53c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 8916894a015cf0d7483debfce1303e3b8477982482db7e4ede705b5e3ea8548f
[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" "8916894a015cf0d7483debfce1303e3b8477982482db7e4ede705b5e3ea8548f", kill_on_drop: false }`
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]   --> src/solver.rs:47:9
[INFO] [stderr]    |
[INFO] [stderr] 47 |         ((diff / 4) + (diff % 4)) // # of rows + cols to move
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]   --> src/solver.rs:47:9
[INFO] [stderr]    |
[INFO] [stderr] 47 |         ((diff / 4) + (diff % 4)) // # of rows + cols to move
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/game15-46e4d4e93b29386d
[INFO] [stdout] 
[INFO] [stdout] running 12 tests
[INFO] [stdout] test solver::tests::solve_random ... ignored
[INFO] [stdout] test board::tests::board_solvable ... ok
[INFO] [stdout] test board::tests::dir_opposes ... ok
[INFO] [stdout] test solver::tests::solve_almost_solved ... ok
[INFO] [stdout] test board::tests::dir_is_opposite ... ok
[INFO] [stdout] test board::tests::dir_value ... ok
[INFO] [stdout] test board::tests::board_clone ... ok
[INFO] [stdout] test board::tests::random_board ... ok
[INFO] [stdout] test board::tests::board_solved ... ok
[INFO] [stdout] test board::tests::create_board ... ok
[INFO] [stdout] test board::tests::board_move ... ok
[INFO] [stdout] test solver::tests::solve_solvable ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 11 passed; 0 failed; 1 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/game15-8b3e989b740d8e1b
[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
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests game15
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]   --> /opt/rustwide/workdir/src/solver.rs:47:9
[INFO] [stderr]    |
[INFO] [stderr] 47 |         ((diff / 4) + (diff % 4)) // # of rows + cols to move
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[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
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "8916894a015cf0d7483debfce1303e3b8477982482db7e4ede705b5e3ea8548f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8916894a015cf0d7483debfce1303e3b8477982482db7e4ede705b5e3ea8548f", kill_on_drop: false }`
[INFO] [stdout] 8916894a015cf0d7483debfce1303e3b8477982482db7e4ede705b5e3ea8548f