[INFO] fetching crate dancing-links 0.2.0...
[INFO] testing dancing-links-0.2.0 against 1.69.0 for beta-1.70-1
[INFO] extracting crate dancing-links 0.2.0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate dancing-links 0.2.0 on toolchain 1.69.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate dancing-links 0.2.0
[INFO] finished tweaking crates.io crate dancing-links 0.2.0
[INFO] tweaked toml for crates.io crate dancing-links 0.2.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" __CARGO_TEST_CHANNEL_OVERRIDE_DO_NOT_USE_THIS="nightly" "/workspace/cargo-home/bin/cargo" "+1.69.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c8b54c06a7252eb0524133bdfbe1cf62ccdcb3a5a64e413da18c815c0728322f
[INFO] running `Command { std: "docker" "start" "-a" "c8b54c06a7252eb0524133bdfbe1cf62ccdcb3a5a64e413da18c815c0728322f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c8b54c06a7252eb0524133bdfbe1cf62ccdcb3a5a64e413da18c815c0728322f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c8b54c06a7252eb0524133bdfbe1cf62ccdcb3a5a64e413da18c815c0728322f", kill_on_drop: false }`
[INFO] [stdout] c8b54c06a7252eb0524133bdfbe1cf62ccdcb3a5a64e413da18c815c0728322f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "RUSTDOCFLAGS=--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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6f07c16811bb3f086ec59d6f6b5fed2f028a2dbfef836457738bdd9370985a25
[INFO] running `Command { std: "docker" "start" "-a" "6f07c16811bb3f086ec59d6f6b5fed2f028a2dbfef836457738bdd9370985a25", kill_on_drop: false }`
[INFO] [stderr]    Compiling bumpalo v3.12.1
[INFO] [stderr]    Compiling dancing-links v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused attribute
[INFO] [stdout]    --> src/grid/base_node.rs:112:9
[INFO] [stdout]     |
[INFO] [stdout] 112 |         #[$lint]
[INFO] [stdout]     |         ^^^^^^^^ help: remove this attribute
[INFO] [stdout] ...
[INFO] [stdout] 132 |     add_direction!(add_below, down, up);
[INFO] [stdout]     |     ----------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: attribute `allow` with an empty list has no effect
[INFO] [stdout]     = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `add_direction` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused attribute
[INFO] [stdout]    --> src/grid/base_node.rs:112:9
[INFO] [stdout]     |
[INFO] [stdout] 112 |         #[$lint]
[INFO] [stdout]     |         ^^^^^^^^ help: remove this attribute
[INFO] [stdout] ...
[INFO] [stdout] 134 |     add_direction!(add_above, up, down);
[INFO] [stdout]     |     ----------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: attribute `allow` with an empty list has no effect
[INFO] [stdout]     = note: this warning originates in the macro `add_direction` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused attribute
[INFO] [stdout]    --> src/grid/base_node.rs:112:9
[INFO] [stdout]     |
[INFO] [stdout] 112 |         #[$lint]
[INFO] [stdout]     |         ^^^^^^^^ help: remove this attribute
[INFO] [stdout] ...
[INFO] [stdout] 136 |     add_direction!(add_right, right, left);
[INFO] [stdout]     |     -------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: attribute `allow` with an empty list has no effect
[INFO] [stdout]     = note: this warning originates in the macro `add_direction` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `min_column` is never read
[INFO] [stdout]   --> src/solver.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 28 | struct Frame {
[INFO] [stdout]    |        ----- field in this struct
[INFO] [stdout] 29 |     min_column: *mut Column,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Frame` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.47s
[INFO] running `Command { std: "docker" "inspect" "6f07c16811bb3f086ec59d6f6b5fed2f028a2dbfef836457738bdd9370985a25", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f07c16811bb3f086ec59d6f6b5fed2f028a2dbfef836457738bdd9370985a25", kill_on_drop: false }`
[INFO] [stdout] 6f07c16811bb3f086ec59d6f6b5fed2f028a2dbfef836457738bdd9370985a25
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "RUSTDOCFLAGS=--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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 37e260c5adbd7e151ab71a2c8caaba5a3f2752fe6f795702f16e8b9ffec367fc
[INFO] running `Command { std: "docker" "start" "-a" "37e260c5adbd7e151ab71a2c8caaba5a3f2752fe6f795702f16e8b9ffec367fc", kill_on_drop: false }`
[INFO] [stdout] warning: unused attribute
[INFO] [stdout]    --> src/grid/base_node.rs:112:9
[INFO] [stdout]     |
[INFO] [stdout] 112 |         #[$lint]
[INFO] [stdout]     |         ^^^^^^^^ help: remove this attribute
[INFO] [stdout] ...
[INFO] [stdout] 132 |     add_direction!(add_below, down, up);
[INFO] [stdout]     |     ----------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: attribute `allow` with an empty list has no effect
[INFO] [stdout]     = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `add_direction` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused attribute
[INFO] [stdout]    --> src/grid/base_node.rs:112:9
[INFO] [stdout]     |
[INFO] [stdout] 112 |         #[$lint]
[INFO] [stdout]     |         ^^^^^^^^ help: remove this attribute
[INFO] [stdout] ...
[INFO] [stdout] 134 |     add_direction!(add_above, up, down);
[INFO] [stdout]     |     ----------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: attribute `allow` with an empty list has no effect
[INFO] [stdout]     = note: this warning originates in the macro `add_direction` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused attribute
[INFO] [stdout]    --> src/grid/base_node.rs:112:9
[INFO] [stdout]     |
[INFO] [stdout] 112 |         #[$lint]
[INFO] [stdout]     |         ^^^^^^^^ help: remove this attribute
[INFO] [stdout] ...
[INFO] [stdout] 136 |     add_direction!(add_right, right, left);
[INFO] [stdout]     |     -------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: attribute `allow` with an empty list has no effect
[INFO] [stdout]     = note: this warning originates in the macro `add_direction` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `min_column` is never read
[INFO] [stdout]   --> src/solver.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 28 | struct Frame {
[INFO] [stdout]    |        ----- field in this struct
[INFO] [stdout] 29 |     min_column: *mut Column,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Frame` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling dancing-links v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused attribute
[INFO] [stdout]    --> src/grid/base_node.rs:112:9
[INFO] [stdout]     |
[INFO] [stdout] 112 |         #[$lint]
[INFO] [stdout]     |         ^^^^^^^^ help: remove this attribute
[INFO] [stdout] ...
[INFO] [stdout] 132 |     add_direction!(add_below, down, up);
[INFO] [stdout]     |     ----------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: attribute `allow` with an empty list has no effect
[INFO] [stdout]     = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `add_direction` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused attribute
[INFO] [stdout]    --> src/grid/base_node.rs:112:9
[INFO] [stdout]     |
[INFO] [stdout] 112 |         #[$lint]
[INFO] [stdout]     |         ^^^^^^^^ help: remove this attribute
[INFO] [stdout] ...
[INFO] [stdout] 134 |     add_direction!(add_above, up, down);
[INFO] [stdout]     |     ----------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: attribute `allow` with an empty list has no effect
[INFO] [stdout]     = note: this warning originates in the macro `add_direction` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused attribute
[INFO] [stdout]    --> src/grid/base_node.rs:112:9
[INFO] [stdout]     |
[INFO] [stdout] 112 |         #[$lint]
[INFO] [stdout]     |         ^^^^^^^^ help: remove this attribute
[INFO] [stdout] ...
[INFO] [stdout] 136 |     add_direction!(add_right, right, left);
[INFO] [stdout]     |     -------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: attribute `allow` with an empty list has no effect
[INFO] [stdout]     = note: this warning originates in the macro `add_direction` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `min_column` is never read
[INFO] [stdout]   --> src/solver.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 28 | struct Frame {
[INFO] [stdout]    |        ----- field in this struct
[INFO] [stdout] 29 |     min_column: *mut Column,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Frame` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.32s
[INFO] running `Command { std: "docker" "inspect" "37e260c5adbd7e151ab71a2c8caaba5a3f2752fe6f795702f16e8b9ffec367fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37e260c5adbd7e151ab71a2c8caaba5a3f2752fe6f795702f16e8b9ffec367fc", kill_on_drop: false }`
[INFO] [stdout] 37e260c5adbd7e151ab71a2c8caaba5a3f2752fe6f795702f16e8b9ffec367fc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "RUSTDOCFLAGS=--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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] a9829391052a5617e23b05541fee2b72e59c75b79fbfb356bc55e4cb63d4a2bb
[INFO] running `Command { std: "docker" "start" "-a" "a9829391052a5617e23b05541fee2b72e59c75b79fbfb356bc55e4cb63d4a2bb", kill_on_drop: false }`
[INFO] [stderr] warning: unused attribute
[INFO] [stderr]    --> src/grid/base_node.rs:112:9
[INFO] [stderr]     |
[INFO] [stderr] 112 |         #[$lint]
[INFO] [stderr]     |         ^^^^^^^^ help: remove this attribute
[INFO] [stderr] ...
[INFO] [stderr] 132 |     add_direction!(add_below, down, up);
[INFO] [stderr]     |     ----------------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: attribute `allow` with an empty list has no effect
[INFO] [stderr]     = note: `#[warn(unused_attributes)]` on by default
[INFO] [stderr]     = note: this warning originates in the macro `add_direction` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused attribute
[INFO] [stderr]    --> src/grid/base_node.rs:112:9
[INFO] [stderr]     |
[INFO] [stderr] 112 |         #[$lint]
[INFO] [stderr]     |         ^^^^^^^^ help: remove this attribute
[INFO] [stderr] ...
[INFO] [stderr] 134 |     add_direction!(add_above, up, down);
[INFO] [stderr]     |     ----------------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: attribute `allow` with an empty list has no effect
[INFO] [stderr]     = note: this warning originates in the macro `add_direction` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused attribute
[INFO] [stderr]    --> src/grid/base_node.rs:112:9
[INFO] [stderr]     |
[INFO] [stderr] 112 |         #[$lint]
[INFO] [stderr]     |         ^^^^^^^^ help: remove this attribute
[INFO] [stderr] ...
[INFO] [stderr] 136 |     add_direction!(add_right, right, left);
[INFO] [stderr]     |     -------------------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: attribute `allow` with an empty list has no effect
[INFO] [stderr]     = note: this warning originates in the macro `add_direction` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: field `min_column` is never read
[INFO] [stderr]   --> src/solver.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 28 | struct Frame {
[INFO] [stderr]    |        ----- field in this struct
[INFO] [stderr] 29 |     min_column: *mut Column,
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Frame` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `dancing-links` (lib) generated 4 warnings (run `cargo fix --lib -p dancing-links` to apply 3 suggestions)
[INFO] [stderr] warning: `dancing-links` (lib test) generated 4 warnings (4 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.00s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/dancing_links-b86d29998a98f49f)
[INFO] [stdout] 
[INFO] [stdout] running 19 tests
[INFO] [stdout] test grid::tests::create_a_small_grid ... ok
[INFO] [stdout] test grid::tests::latin_square_cover_1 ... ok
[INFO] [stdout] test grid::tests::cover_uncover_all ... ok
[INFO] [stdout] test grid::tests::create_weird_grids ... ok
[INFO] [stdout] test grid::tests::cover_uncover_column ... ok
[INFO] [stdout] test latin_square::tests::check_all_possibilities ... ok
[INFO] [stdout] test latin_square::tests::check_generated_possibilities_constraints ... ok
[INFO] [stdout] test latin_square::tests::solve_impossible_latin_square ... ok
[INFO] [stdout] test queens::tests::check_diagonal_indices ... ok
[INFO] [stdout] test latin_square::tests::solve_multi_solution_latin_square ... ok
[INFO] [stdout] test latin_square::tests::solve_small_latin_square ... ok
[INFO] [stdout] test util::tests::latin_square_test_1 ... ok
[INFO] [stdout] test util::tests::latin_square_test_3 ... ok
[INFO] [stdout] test util::tests::three_combo ... ok
[INFO] [stdout] test sudoku::tests::check_generated_possibilities_constraints ... ok
[INFO] [stdout] test queens::tests::check_tiny_boards ... ok
[INFO] [stdout] test queens::tests::check_small_board ... ok
[INFO] [stdout] test sudoku::tests::solve_small_sudoku ... ok
[INFO] [stdout] test queens::tests::count_medium_board ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 19 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests dancing-links
[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" "a9829391052a5617e23b05541fee2b72e59c75b79fbfb356bc55e4cb63d4a2bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a9829391052a5617e23b05541fee2b72e59c75b79fbfb356bc55e4cb63d4a2bb", kill_on_drop: false }`
[INFO] [stdout] a9829391052a5617e23b05541fee2b72e59c75b79fbfb356bc55e4cb63d4a2bb
