[INFO] cloning repository https://github.com/hsanzg/exact-covers
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hsanzg/exact-covers" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhsanzg%2Fexact-covers", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhsanzg%2Fexact-covers'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bae3c65073092f9ad728759e3c14d8d5a780e6c4
[INFO] testing hsanzg/exact-covers against master#562dee4820c458d823175268e41601d4c060588a for pr-154210-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhsanzg%2Fexact-covers" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/hsanzg/exact-covers
[INFO] removed 0 missing examples
[INFO] finished tweaking git repo https://github.com/hsanzg/exact-covers
[INFO] tweaked toml for git repo https://github.com/hsanzg/exact-covers written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/hsanzg/exact-covers on toolchain 562dee4820c458d823175268e41601d4c060588a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/hsanzg/exact-covers already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded smallvec v2.0.0-alpha.12
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 165279c16a5e4c13d32c9b00e69a2e05b89ce700d866d8dae6f67b96d267922f
[INFO] running `Command { std: "docker" "start" "-a" "165279c16a5e4c13d32c9b00e69a2e05b89ce700d866d8dae6f67b96d267922f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "165279c16a5e4c13d32c9b00e69a2e05b89ce700d866d8dae6f67b96d267922f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "165279c16a5e4c13d32c9b00e69a2e05b89ce700d866d8dae6f67b96d267922f", kill_on_drop: false }`
[INFO] [stdout] 165279c16a5e4c13d32c9b00e69a2e05b89ce700d866d8dae6f67b96d267922f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=forbid" "-e" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1ffb645a02c270b587e1c1a15fd16b5baca9711b1ec2ea3fdfd413c18463462f
[INFO] running `Command { std: "docker" "start" "-a" "1ffb645a02c270b587e1c1a15fd16b5baca9711b1ec2ea3fdfd413c18463462f", kill_on_drop: false }`
[INFO] [stderr]    Compiling exact-covers v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.26s
[INFO] running `Command { std: "docker" "inspect" "1ffb645a02c270b587e1c1a15fd16b5baca9711b1ec2ea3fdfd413c18463462f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ffb645a02c270b587e1c1a15fd16b5baca9711b1ec2ea3fdfd413c18463462f", kill_on_drop: false }`
[INFO] [stdout] 1ffb645a02c270b587e1c1a15fd16b5baca9711b1ec2ea3fdfd413c18463462f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=forbid" "-e" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 81e57ad8440f41239ba2bb18bb56a28c3b6fb75f012dd2e1157ce69a4f6d5c17
[INFO] running `Command { std: "docker" "start" "-a" "81e57ad8440f41239ba2bb18bb56a28c3b6fb75f012dd2e1157ce69a4f6d5c17", kill_on_drop: false }`
[INFO] [stderr]    Compiling smallvec v2.0.0-alpha.12
[INFO] [stderr]    Compiling exact-covers v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 2.12s
[INFO] running `Command { std: "docker" "inspect" "81e57ad8440f41239ba2bb18bb56a28c3b6fb75f012dd2e1157ce69a4f6d5c17", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "81e57ad8440f41239ba2bb18bb56a28c3b6fb75f012dd2e1157ce69a4f6d5c17", kill_on_drop: false }`
[INFO] [stdout] 81e57ad8440f41239ba2bb18bb56a28c3b6fb75f012dd2e1157ce69a4f6d5c17
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=forbid" "-e" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 11e406cf8d8a260b08fd7f50fe9fdc896ce53e00fa1e03ab3caa3ede8b7add2b
[INFO] running `Command { std: "docker" "start" "-a" "11e406cf8d8a260b08fd7f50fe9fdc896ce53e00fa1e03ab3caa3ede8b7add2b", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/exact_covers-60667b2184435ffc)
[INFO] [stdout] 
[INFO] [stdout] running 13 tests
[INFO] [stdout] test dl::tests::another_toy_problem_with_colors ... ok
[INFO] [stdout] test dl::tests::find_item ... ok
[INFO] [stdout] test dl::tests::new_exact_cover_with_primary_only ... ok
[INFO] [stdout] test dl::tests::new_exact_cover_without_primary_has_no_solution ... ok
[INFO] [stdout] test dl::tests::skips_solutions_that_do_not_intersect_a_purely_secondary_option ... ok
[INFO] [stdout] test dl::tests::skips_solutions_with_purely_secondary_options ... ok
[INFO] [stdout] test indices::tests::index_decrement ... ok
[INFO] [stdout] test indices::tests::index_get ... ok
[INFO] [stdout] test dl::tests::toy_problem_with_colors ... ok
[INFO] [stdout] test dl::tests::solutions_intersect_item_sets_of_purely_secondary_options ... ok
[INFO] [stdout] test indices::tests::index_increment ... ok
[INFO] [stdout] test dl::tests::new_exact_cover_with_primary_and_secondary ... ok
[INFO] [stdout] test indices::tests::out_of_bounds_node_index - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 13 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.05s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests exact_covers
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - Solver (line 160) ... ok
[INFO] [stdout] test src/lib.rs - Solver (line 114) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] all doctests ran in 0.72s; merged doctests compilation took 0.72s
[INFO] running `Command { std: "docker" "inspect" "11e406cf8d8a260b08fd7f50fe9fdc896ce53e00fa1e03ab3caa3ede8b7add2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "11e406cf8d8a260b08fd7f50fe9fdc896ce53e00fa1e03ab3caa3ede8b7add2b", kill_on_drop: false }`
[INFO] [stdout] 11e406cf8d8a260b08fd7f50fe9fdc896ce53e00fa1e03ab3caa3ede8b7add2b