[INFO] fetching crate sliding_puzzle 1.0.1...
[INFO] testing sliding_puzzle-1.0.1 against 1.60.0 for beta-1.61-1
[INFO] extracting crate sliding_puzzle 1.0.1 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate sliding_puzzle 1.0.1 on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate sliding_puzzle 1.0.1
[INFO] finished tweaking crates.io crate sliding_puzzle 1.0.1
[INFO] tweaked toml for crates.io crate sliding_puzzle 1.0.1 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate crates.io crate sliding_puzzle 1.0.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded lehmer v2.0.0
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", 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] 63a3297d76c89f1b7698673334597eadf411f095909ff76375ab76a32e193bf5
[INFO] running `Command { std: "docker" "start" "-a" "63a3297d76c89f1b7698673334597eadf411f095909ff76375ab76a32e193bf5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "63a3297d76c89f1b7698673334597eadf411f095909ff76375ab76a32e193bf5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "63a3297d76c89f1b7698673334597eadf411f095909ff76375ab76a32e193bf5", kill_on_drop: false }`
[INFO] [stdout] 63a3297d76c89f1b7698673334597eadf411f095909ff76375ab76a32e193bf5
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "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] 3b86f229d341f7e2c0f49e465105cfa0a96090d62c70e16cc7e5f0526c6a1d9d
[INFO] running `Command { std: "docker" "start" "-a" "3b86f229d341f7e2c0f49e465105cfa0a96090d62c70e16cc7e5f0526c6a1d9d", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.89
[INFO] [stderr]    Compiling bit-vec v0.4.4
[INFO] [stderr]    Compiling lehmer v2.0.0
[INFO] [stderr]    Compiling bit-set v0.4.0
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling sliding_puzzle v1.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.32s
[INFO] running `Command { std: "docker" "inspect" "3b86f229d341f7e2c0f49e465105cfa0a96090d62c70e16cc7e5f0526c6a1d9d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b86f229d341f7e2c0f49e465105cfa0a96090d62c70e16cc7e5f0526c6a1d9d", kill_on_drop: false }`
[INFO] [stdout] 3b86f229d341f7e2c0f49e465105cfa0a96090d62c70e16cc7e5f0526c6a1d9d
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6dcaa42d9bed78d34293f5ba04bd943da9af34625dc32f343d6ef163d8af43e8
[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" "6dcaa42d9bed78d34293f5ba04bd943da9af34625dc32f343d6ef163d8af43e8", kill_on_drop: false }`
[INFO] [stderr]    Compiling bencher v0.1.5
[INFO] [stderr]    Compiling sliding_puzzle v1.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 4.89s
[INFO] running `Command { std: "docker" "inspect" "6dcaa42d9bed78d34293f5ba04bd943da9af34625dc32f343d6ef163d8af43e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6dcaa42d9bed78d34293f5ba04bd943da9af34625dc32f343d6ef163d8af43e8", kill_on_drop: false }`
[INFO] [stdout] 6dcaa42d9bed78d34293f5ba04bd943da9af34625dc32f343d6ef163d8af43e8
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen", 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] 529d4b45b4df5010f1cf2b49e8fb879952dd0a3ff1b5649b9d8a3bf56edd3978
[INFO] running `Command { std: "docker" "start" "-a" "529d4b45b4df5010f1cf2b49e8fb879952dd0a3ff1b5649b9d8a3bf56edd3978", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/sliding_puzzle-4cd93d18457dc43f)
[INFO] [stdout] running 55 tests
[INFO] [stdout] test base::test::from_decimal::it_constructs_a_puzzle_from_the_factorial_base_number_in_general ... ok
[INFO] [stdout] test base::test::blank_is_on_the_x::blank_is_on_the_top::it_returns_the_expected_true_false_values ... ok
[INFO] [stdout] test base::test::from_decimal::it_errors_if_columns_is_zero ... ok
[INFO] [stdout] test base::test::from_decimal::it_errors_if_rows_is_zero ... ok
[INFO] [stdout] test base::test::from_decimal::it_errors_if_the_puzzle_contains_more_than_twenty_tiles ... ok
[INFO] [stdout] test base::test::get::it_returns_none_if_out_of_bounds ... ok
[INFO] [stdout] test base::test::in_bounds::it_returns_true_if_the_x_y_position_is_in_bounds ... ok
[INFO] [stdout] test base::test::moves::it_returns_four_directions_when_the_blank_is_in_the_middle ... ok
[INFO] [stdout] test base::test::moves::it_returns_two_directions_when_the_blank_is_in_a_corner ... ok
[INFO] [stdout] test base::test::new::it_can_be_used_in_a_generic_way ... ok
[INFO] [stdout] test base::test::new::it_errors_if_the_puzzle_contains_more_than_one_blank ... ok
[INFO] [stdout] test base::test::new::it_errors_if_the_puzzle_has_no_columns ... ok
[INFO] [stdout] test base::test::blank_is_on_the_x::blank_is_on_the_right::it_returns_the_expected_true_false_values ... ok
[INFO] [stdout] test base::test::new::it_errors_if_the_puzzle_has_no_rows ... ok
[INFO] [stdout] test base::test::new::it_errors_if_the_puzzle_isnt_rectangular ... ok
[INFO] [stdout] test base::test::position::it_finds_the_x_y_position_of_the_tile ... ok
[INFO] [stdout] test base::test::new::it_is_initialized_with_a_2d_slice ... ok
[INFO] [stdout] test base::test::position::it_returns_none_if_the_tile_cant_be_found ... ok
[INFO] [stdout] test base::test::move_is_valid::it_returns_whether_the_move_can_be_made_in_the_puzzle ... ok
[INFO] [stdout] test base::test::new::it_errors_if_the_puzzle_doesnt_contain_a_blank ... ok
[INFO] [stdout] test base::test::blank_is_on_the_x::blank_is_on_the_bottom::it_returns_the_expected_true_false_values ... ok
[INFO] [stdout] test base::test::from_decimal_unchecked::it_constructs_a_puzzle_from_the_factorial_base_number_in_general ... ok
[INFO] [stdout] test base::test::from_decimal_unchecked::it_constructs_a_puzzle_with_sequential_tiles_for_zero ... ok
[INFO] [stdout] test base::test::get::it_gets_the_tile_at_x_y_position ... ok
[INFO] [stdout] test base::test::blank_is_on_the_x::blank_is_on_the_left::it_returns_the_expected_true_false_values ... ok
[INFO] [stdout] test base::test::moves::it_returns_three_directions_when_the_blank_is_at_an_edge ... ok
[INFO] [stdout] test base::test::new::it_initializes_correctly_when_theres_a_single_row ... ok
[INFO] [stdout] test base::test::slide_mut_unchecked::it_might_not_panic_if_the_move_is_invalid ... ok
[INFO] [stdout] test base::test::slide_unchecked::it_might_not_panic_if_the_move_is_invalid ... ok
[INFO] [stdout] test base::test::slide::it_does_not_mutate_the_subject ... ok
[INFO] [stdout] test base::test::slide_mut::it_errors_if_the_move_is_invalid ... ok
[INFO] [stdout] test base::test::slide_mut::it_slides_a_tile_in_the_direction_of_the_blank ... ok
[INFO] [stdout] test base::test::slide_mut_unchecked::it_can_be_chained_for_convenience ... ok
[INFO] [stdout] test base::test::slide_unchecked::it_can_be_chained_for_convenience ... ok
[INFO] [stdout] test base::test::slide_unchecked::it_does_not_mutate_the_subject ... ok
[INFO] [stdout] test base::test::from_decimal::it_errors_if_n_is_too_large ... ok
[INFO] [stdout] test base::test::slide_mut::it_does_not_mutate_the_puzzle_if_the_move_is_invalid ... ok
[INFO] [stdout] test base::test::slide::it_slides_a_tile_in_the_direction_of_the_blank ... ok
[INFO] [stdout] test base::test::slide_unchecked::it_slides_a_tile_in_the_direction_of_the_blank ... ok
[INFO] [stdout] test base::test::tiles::it_reconstructs_the_2d_representation_of_the_puzzle ... ok
[INFO] [stdout] test base::test::to_decimal::it_errors_if_the_puzzle_doesnt_contain_zero_through_n_minus_one ... ok
[INFO] [stdout] test base::test::to_decimal::it_returns_the_factorial_base_number_in_general ... ok
[INFO] [stdout] test base::test::to_decimal_unchecked::it_returns_the_factorial_base_number_in_general ... ok
[INFO] [stdout] test base::test::to_decimal_unchecked::it_returns_zero_if_the_tiles_are_in_sequence ... ok
[INFO] [stdout] test direction::test::opposite::it_returns_the_opposite_direction ... ok
[INFO] [stdout] test direction::test::y::it_returns_the_y_offset_relative_to_the_blank_for_the_moving_tile ... ok
[INFO] [stdout] test error::test::fmt::it_formats_the_error ... ok
[INFO] [stdout] test direction::test::x::it_returns_the_x_offset_relative_to_the_blank_for_the_moving_tile ... ok
[INFO] [stdout] test base::test::slide::it_errors_if_the_move_is_invalid ... ok
[INFO] [stdout] test error::test::new::it_is_initialized_with_a_description ... ok
[INFO] [stdout] test base::test::slide_mut_unchecked::it_slides_a_tile_in_the_direction_of_the_blank ... ok
[INFO] [stdout] test base::test::scramble::it_does_not_immediately_double_back_on_itself ... ok
[INFO] [stdout] test base::test::scramble::it_slides_in_a_random_direction_a_number_of_times ... ok
[INFO] [stdout] test base::test::slide_mut_unchecked::it_might_panic_if_the_move_is_invalid - should panic ... ok
[INFO] [stdout] test base::test::slide_unchecked::it_might_panic_if_the_move_is_invalid - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 55 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.08s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/search-a273960a45f73db1)
[INFO] [stdout] 
[INFO] [stderr]      Running tests/sliding_puzzle_test.rs (/opt/rustwide/target/debug/deps/sliding_puzzle_test-719c8dbd43b70fb7)
[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] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test it_works_for_the_example_in_the_readme ... ok
[INFO] [stderr]    Doc-tests sliding_puzzle
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[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" "529d4b45b4df5010f1cf2b49e8fb879952dd0a3ff1b5649b9d8a3bf56edd3978", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "529d4b45b4df5010f1cf2b49e8fb879952dd0a3ff1b5649b9d8a3bf56edd3978", kill_on_drop: false }`
[INFO] [stdout] 529d4b45b4df5010f1cf2b49e8fb879952dd0a3ff1b5649b9d8a3bf56edd3978