[INFO] fetching crate dancing-links 0.2.0...
[INFO] testing dancing-links-0.2.0 against master#5d5ff84130da0d74c6ece368dbe821d8f83fa526 for pr-79296
[INFO] extracting crate dancing-links 0.2.0 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate dancing-links 0.2.0 on toolchain 5d5ff84130da0d74c6ece368dbe821d8f83fa526
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "read-manifest" "--manifest-path" "Cargo.toml", 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-14/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4bbfe5e1442e91a619d62c6ae4924bb1c86bb933b7085bd48289c187e070fd52
[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" "4bbfe5e1442e91a619d62c6ae4924bb1c86bb933b7085bd48289c187e070fd52", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4bbfe5e1442e91a619d62c6ae4924bb1c86bb933b7085bd48289c187e070fd52", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4bbfe5e1442e91a619d62c6ae4924bb1c86bb933b7085bd48289c187e070fd52", kill_on_drop: false }`
[INFO] [stdout] 4bbfe5e1442e91a619d62c6ae4924bb1c86bb933b7085bd48289c187e070fd52
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a08500a9256148547fa9e8828b63438c14b58f5a5635fe6e1ed6b779720c2746
[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" "a08500a9256148547fa9e8828b63438c14b58f5a5635fe6e1ed6b779720c2746", kill_on_drop: false }`
[INFO] [stderr]    Compiling bumpalo v3.4.0
[INFO] [stderr]    Compiling dancing-links v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.72s
[INFO] running `Command { std: "docker" "inspect" "a08500a9256148547fa9e8828b63438c14b58f5a5635fe6e1ed6b779720c2746", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a08500a9256148547fa9e8828b63438c14b58f5a5635fe6e1ed6b779720c2746", kill_on_drop: false }`
[INFO] [stdout] a08500a9256148547fa9e8828b63438c14b58f5a5635fe6e1ed6b779720c2746
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6b89957d597d2583d5066750e068db7a7a7e12b3be8dc29a07c119cb6510b514
[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" "6b89957d597d2583d5066750e068db7a7a7e12b3be8dc29a07c119cb6510b514", kill_on_drop: false }`
[INFO] [stderr]    Compiling dancing-links v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 5.69s
[INFO] running `Command { std: "docker" "inspect" "6b89957d597d2583d5066750e068db7a7a7e12b3be8dc29a07c119cb6510b514", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b89957d597d2583d5066750e068db7a7a7e12b3be8dc29a07c119cb6510b514", kill_on_drop: false }`
[INFO] [stdout] 6b89957d597d2583d5066750e068db7a7a7e12b3be8dc29a07c119cb6510b514
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "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] 6ca5bf0d35cbba5f4e0d1cff25e4cfaa364da4e532b8e718550158d405d9afa0
[INFO] running `Command { std: "docker" "start" "-a" "6ca5bf0d35cbba5f4e0d1cff25e4cfaa364da4e532b8e718550158d405d9afa0", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stdout] running 19 tests
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/dancing_links-c0345d17c397956f
[INFO] [stdout] test grid::tests::create_a_small_grid ... ok
[INFO] [stdout] test grid::tests::cover_uncover_column ... ok
[INFO] [stdout] test grid::tests::create_weird_grids ... ok
[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::check_generated_possibilities_constraints ... ok
[INFO] [stdout] test queens::tests::check_diagonal_indices ... ok
[INFO] [stdout] test latin_square::tests::solve_small_latin_square ... ok
[INFO] [stdout] test grid::tests::latin_square_cover_1 ... ok
[INFO] [stdout] test queens::tests::check_tiny_boards ... ok
[INFO] [stdout] test util::tests::latin_square_test_3 ... ok
[INFO] [stdout] test util::tests::three_combo ... ok
[INFO] [stdout] test queens::tests::check_small_board ... ok
[INFO] [stdout] test latin_square::tests::solve_multi_solution_latin_square ... ok
[INFO] [stdout] test latin_square::tests::solve_impossible_latin_square ... ok
[INFO] [stdout] test sudoku::tests::check_generated_possibilities_constraints ... ok
[INFO] [stdout] test sudoku::tests::solve_small_sudoku ... ok
[INFO] [stdout] test util::tests::latin_square_test_1 ... ok
[INFO] [stderr]    Doc-tests dancing-links
[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
[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
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "6ca5bf0d35cbba5f4e0d1cff25e4cfaa364da4e532b8e718550158d405d9afa0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6ca5bf0d35cbba5f4e0d1cff25e4cfaa364da4e532b8e718550158d405d9afa0", kill_on_drop: false }`
[INFO] [stdout] 6ca5bf0d35cbba5f4e0d1cff25e4cfaa364da4e532b8e718550158d405d9afa0