[INFO] fetching crate dancing-links 0.2.0...
[INFO] testing dancing-links-0.2.0 against try#ecabaf78506b7a4668d42dc20268c086b93f0fad for pr-87041
[INFO] extracting crate dancing-links 0.2.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate dancing-links 0.2.0 on toolchain ecabaf78506b7a4668d42dc20268c086b93f0fad
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "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-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4f5a8c8bc93f6e6ed60f7d02e670a3a49bb142fdb7a5456bf38d6827df459cd9
[INFO] running `Command { std: "docker" "start" "-a" "4f5a8c8bc93f6e6ed60f7d02e670a3a49bb142fdb7a5456bf38d6827df459cd9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4f5a8c8bc93f6e6ed60f7d02e670a3a49bb142fdb7a5456bf38d6827df459cd9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f5a8c8bc93f6e6ed60f7d02e670a3a49bb142fdb7a5456bf38d6827df459cd9", kill_on_drop: false }`
[INFO] [stdout] 4f5a8c8bc93f6e6ed60f7d02e670a3a49bb142fdb7a5456bf38d6827df459cd9
[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=forbid" "-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e0dfc7fc3e8d8499132aa49bf9a4bfd9e633470770339ba16a52a7e7be7f8a1e
[INFO] running `Command { std: "docker" "start" "-a" "e0dfc7fc3e8d8499132aa49bf9a4bfd9e633470770339ba16a52a7e7be7f8a1e", kill_on_drop: false }`
[INFO] [stderr]    Compiling bumpalo v3.7.0
[INFO] [stderr]    Compiling dancing-links v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.45s
[INFO] running `Command { std: "docker" "inspect" "e0dfc7fc3e8d8499132aa49bf9a4bfd9e633470770339ba16a52a7e7be7f8a1e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0dfc7fc3e8d8499132aa49bf9a4bfd9e633470770339ba16a52a7e7be7f8a1e", kill_on_drop: false }`
[INFO] [stdout] e0dfc7fc3e8d8499132aa49bf9a4bfd9e633470770339ba16a52a7e7be7f8a1e
[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=forbid" "-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ba1180c35183e193367c099b78b0ea1af2c75cc2fd53e221ecfa87f8d1e72115
[INFO] running `Command { std: "docker" "start" "-a" "ba1180c35183e193367c099b78b0ea1af2c75cc2fd53e221ecfa87f8d1e72115", kill_on_drop: false }`
[INFO] [stderr]    Compiling dancing-links v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 3.56s
[INFO] running `Command { std: "docker" "inspect" "ba1180c35183e193367c099b78b0ea1af2c75cc2fd53e221ecfa87f8d1e72115", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ba1180c35183e193367c099b78b0ea1af2c75cc2fd53e221ecfa87f8d1e72115", kill_on_drop: false }`
[INFO] [stdout] ba1180c35183e193367c099b78b0ea1af2c75cc2fd53e221ecfa87f8d1e72115
[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=forbid" "-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] c815e9682583f0c22276e4518ed5f557c8c1efbf51c299050075f29456e3debe
[INFO] running `Command { std: "docker" "start" "-a" "c815e9682583f0c22276e4518ed5f557c8c1efbf51c299050075f29456e3debe", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/dancing_links-6f8f73714136ede4)
[INFO] [stdout] 
[INFO] [stdout] running 19 tests
[INFO] [stdout] test grid::tests::cover_uncover_all ... ok
[INFO] [stdout] test latin_square::tests::check_all_possibilities ... ok
[INFO] [stdout] test latin_square::tests::solve_multi_solution_latin_square ... ok
[INFO] [stdout] test latin_square::tests::check_generated_possibilities_constraints ... ok
[INFO] [stdout] test latin_square::tests::solve_small_latin_square ... ok
[INFO] [stdout] test latin_square::tests::solve_impossible_latin_square ... ok
[INFO] [stdout] test queens::tests::check_small_board ... ok
[INFO] [stdout] test grid::tests::cover_uncover_column ... ok
[INFO] [stdout] test queens::tests::check_diagonal_indices ... ok
[INFO] [stdout] test util::tests::three_combo ... ok
[INFO] [stdout] test util::tests::latin_square_test_1 ... ok
[INFO] [stdout] test grid::tests::create_a_small_grid ... ok
[INFO] [stdout] test grid::tests::create_weird_grids ... ok
[INFO] [stdout] test grid::tests::latin_square_cover_1 ... ok
[INFO] [stdout] test util::tests::latin_square_test_3 ... ok
[INFO] [stdout] test sudoku::tests::check_generated_possibilities_constraints ... ok
[INFO] [stdout] test sudoku::tests::solve_small_sudoku ... ok
[INFO] [stdout] test queens::tests::check_tiny_boards ... 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 0.06s
[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" "c815e9682583f0c22276e4518ed5f557c8c1efbf51c299050075f29456e3debe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c815e9682583f0c22276e4518ed5f557c8c1efbf51c299050075f29456e3debe", kill_on_drop: false }`
[INFO] [stdout] c815e9682583f0c22276e4518ed5f557c8c1efbf51c299050075f29456e3debe