[INFO] fetching crate exact-cover 0.1.1...
[INFO] testing exact-cover-0.1.1 against beta-2022-04-10 for beta-1.61-1
[INFO] extracting crate exact-cover 0.1.1 into /workspace/builds/worker-38/source
[INFO] validating manifest of crates.io crate exact-cover 0.1.1 on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate exact-cover 0.1.1
[INFO] finished tweaking crates.io crate exact-cover 0.1.1
[INFO] tweaked toml for crates.io crate exact-cover 0.1.1 written to /workspace/builds/worker-38/source/Cargo.toml
[INFO] crate crates.io crate exact-cover 0.1.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-38/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-38/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2c19ba4059ec93cf200206f4fe81e3a3394a8f9a209996cb6ad4862f055faa04
[INFO] running `Command { std: "docker" "start" "-a" "2c19ba4059ec93cf200206f4fe81e3a3394a8f9a209996cb6ad4862f055faa04", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2c19ba4059ec93cf200206f4fe81e3a3394a8f9a209996cb6ad4862f055faa04", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c19ba4059ec93cf200206f4fe81e3a3394a8f9a209996cb6ad4862f055faa04", kill_on_drop: false }`
[INFO] [stdout] 2c19ba4059ec93cf200206f4fe81e3a3394a8f9a209996cb6ad4862f055faa04
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-38/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-38/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 487c80934044c34fb5fc61d472d07438e1626d435791312ce3cc1e946a77308a
[INFO] running `Command { std: "docker" "start" "-a" "487c80934044c34fb5fc61d472d07438e1626d435791312ce3cc1e946a77308a", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]    Compiling futures-core v0.3.18
[INFO] [stderr]    Compiling syn v1.0.82
[INFO] [stderr]    Compiling futures-channel v0.3.18
[INFO] [stderr]    Compiling futures-task v0.3.18
[INFO] [stderr]    Compiling futures-sink v0.3.18
[INFO] [stderr]    Compiling futures-util v0.3.18
[INFO] [stderr]    Compiling pin-project-lite v0.2.7
[INFO] [stderr]    Compiling slab v0.4.5
[INFO] [stderr]    Compiling futures-io v0.3.18
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]    Compiling futures-macro v0.3.18
[INFO] [stderr]    Compiling futures-executor v0.3.18
[INFO] [stderr]    Compiling futures v0.3.18
[INFO] [stderr]    Compiling exact-cover v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 15.97s
[INFO] running `Command { std: "docker" "inspect" "487c80934044c34fb5fc61d472d07438e1626d435791312ce3cc1e946a77308a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "487c80934044c34fb5fc61d472d07438e1626d435791312ce3cc1e946a77308a", kill_on_drop: false }`
[INFO] [stdout] 487c80934044c34fb5fc61d472d07438e1626d435791312ce3cc1e946a77308a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-38/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-38/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b153f3f706cbbb8e5dafa4622f6636acfbc51831999d24b8978362ad6c97af7c
[INFO] running `Command { std: "docker" "start" "-a" "b153f3f706cbbb8e5dafa4622f6636acfbc51831999d24b8978362ad6c97af7c", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling exact-cover v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 3.56s
[INFO] [stderr]   Executable unittests src/lib.rs (/opt/rustwide/target/debug/deps/exact_cover-164c14f932d20afb)
[INFO] running `Command { std: "docker" "inspect" "b153f3f706cbbb8e5dafa4622f6636acfbc51831999d24b8978362ad6c97af7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b153f3f706cbbb8e5dafa4622f6636acfbc51831999d24b8978362ad6c97af7c", kill_on_drop: false }`
[INFO] [stdout] b153f3f706cbbb8e5dafa4622f6636acfbc51831999d24b8978362ad6c97af7c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-38/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-38/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] cdb34a1c039c9d5750cb801eb35c979f353e6cae3590762b487b6d9d0bb1311a
[INFO] running `Command { std: "docker" "start" "-a" "cdb34a1c039c9d5750cb801eb35c979f353e6cae3590762b487b6d9d0bb1311a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.45s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/exact_cover-164c14f932d20afb)
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test problem::tests::problem_can_be_created ... ok
[INFO] [stdout] test problems::polyomino::tests::unique_orientations_can_be_found ... ok
[INFO] [stdout] test problems::polyomino::tests::problem_can_be_solved ... ok
[INFO] [stdout] test solver::tests::solver_can_solve_problem ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests exact-cover
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - (line 17) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 3.21s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "cdb34a1c039c9d5750cb801eb35c979f353e6cae3590762b487b6d9d0bb1311a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cdb34a1c039c9d5750cb801eb35c979f353e6cae3590762b487b6d9d0bb1311a", kill_on_drop: false }`
[INFO] [stdout] cdb34a1c039c9d5750cb801eb35c979f353e6cae3590762b487b6d9d0bb1311a