[INFO] fetching crate practicum 0.0.0...
[INFO] testing practicum-0.0.0 against beta-2022-02-22 for beta-1.60-1
[INFO] extracting crate practicum 0.0.0 into /workspace/builds/worker-72/source
[INFO] validating manifest of crates.io crate practicum 0.0.0 on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate practicum 0.0.0
[INFO] finished tweaking crates.io crate practicum 0.0.0
[INFO] tweaked toml for crates.io crate practicum 0.0.0 written to /workspace/builds/worker-72/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "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" "+beta-2022-02-22" "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-72/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 81572c6e4133285ff1894d45c6a99ca3db9fab4f6d3efa99f35bc666d7b00e18
[INFO] running `Command { std: "docker" "start" "-a" "81572c6e4133285ff1894d45c6a99ca3db9fab4f6d3efa99f35bc666d7b00e18", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "81572c6e4133285ff1894d45c6a99ca3db9fab4f6d3efa99f35bc666d7b00e18", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "81572c6e4133285ff1894d45c6a99ca3db9fab4f6d3efa99f35bc666d7b00e18", kill_on_drop: false }`
[INFO] [stdout] 81572c6e4133285ff1894d45c6a99ca3db9fab4f6d3efa99f35bc666d7b00e18
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7040d20cf36834b78ad229a3d13419181b95d61a2d59a09d5a4059aff3acd12e
[INFO] running `Command { std: "docker" "start" "-a" "7040d20cf36834b78ad229a3d13419181b95d61a2d59a09d5a4059aff3acd12e", kill_on_drop: false }`
[INFO] [stderr]    Compiling practicum v0.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.73s
[INFO] running `Command { std: "docker" "inspect" "7040d20cf36834b78ad229a3d13419181b95d61a2d59a09d5a4059aff3acd12e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7040d20cf36834b78ad229a3d13419181b95d61a2d59a09d5a4059aff3acd12e", kill_on_drop: false }`
[INFO] [stdout] 7040d20cf36834b78ad229a3d13419181b95d61a2d59a09d5a4059aff3acd12e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c06d2a65bf62d131912d37fc95643b4daee579a586cabdfde375c6068a795bed
[INFO] running `Command { std: "docker" "start" "-a" "c06d2a65bf62d131912d37fc95643b4daee579a586cabdfde375c6068a795bed", kill_on_drop: false }`
[INFO] [stderr]    Compiling practicum v0.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.58s
[INFO] running `Command { std: "docker" "inspect" "c06d2a65bf62d131912d37fc95643b4daee579a586cabdfde375c6068a795bed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c06d2a65bf62d131912d37fc95643b4daee579a586cabdfde375c6068a795bed", kill_on_drop: false }`
[INFO] [stdout] c06d2a65bf62d131912d37fc95643b4daee579a586cabdfde375c6068a795bed
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 03f6e043049a292d461c22b586b7d11851128c735dc663a766ecb5e1f1f32438
[INFO] running `Command { std: "docker" "start" "-a" "03f6e043049a292d461c22b586b7d11851128c735dc663a766ecb5e1f1f32438", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.12s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/practicum-4b6a13616f3f1b0d)
[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" "03f6e043049a292d461c22b586b7d11851128c735dc663a766ecb5e1f1f32438", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "03f6e043049a292d461c22b586b7d11851128c735dc663a766ecb5e1f1f32438", kill_on_drop: false }`
[INFO] [stdout] 03f6e043049a292d461c22b586b7d11851128c735dc663a766ecb5e1f1f32438