[INFO] fetching crate weblab-assignment-structure 0.3.4...
[INFO] testing weblab-assignment-structure-0.3.4 against 1.91.0 for beta-1.92-2
[INFO] extracting crate weblab-assignment-structure 0.3.4 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate weblab-assignment-structure 0.3.4
[INFO] finished tweaking crates.io crate weblab-assignment-structure 0.3.4
[INFO] tweaked toml for crates.io crate weblab-assignment-structure 0.3.4 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate weblab-assignment-structure 0.3.4 on toolchain 1.91.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "generate-lockfile" "--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: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "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-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 258ff282e7e33d25f00fb60b50ccf504b0b3ac6e8d0c57b4cbc47178ced22575
[INFO] running `Command { std: "docker" "start" "-a" "258ff282e7e33d25f00fb60b50ccf504b0b3ac6e8d0c57b4cbc47178ced22575", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "258ff282e7e33d25f00fb60b50ccf504b0b3ac6e8d0c57b4cbc47178ced22575", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "258ff282e7e33d25f00fb60b50ccf504b0b3ac6e8d0c57b4cbc47178ced22575", kill_on_drop: false }`
[INFO] [stdout] 258ff282e7e33d25f00fb60b50ccf504b0b3ac6e8d0c57b4cbc47178ced22575
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=warn" "-e" "RUSTDOCFLAGS=--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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 585138b067d8a0192ff42d94d1354affed7f8656f8e53884a46e079859419dac
[INFO] running `Command { std: "docker" "start" "-a" "585138b067d8a0192ff42d94d1354affed7f8656f8e53884a46e079859419dac", kill_on_drop: false }`
[INFO] [stderr]    Compiling weblab-assignment-structure v0.3.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.16s
[INFO] running `Command { std: "docker" "inspect" "585138b067d8a0192ff42d94d1354affed7f8656f8e53884a46e079859419dac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "585138b067d8a0192ff42d94d1354affed7f8656f8e53884a46e079859419dac", kill_on_drop: false }`
[INFO] [stdout] 585138b067d8a0192ff42d94d1354affed7f8656f8e53884a46e079859419dac
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=warn" "-e" "RUSTDOCFLAGS=--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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4afd372691d63425e70c56608fea5b9fb9278c83fa50485748695fb14087a7eb
[INFO] running `Command { std: "docker" "start" "-a" "4afd372691d63425e70c56608fea5b9fb9278c83fa50485748695fb14087a7eb", kill_on_drop: false }`
[INFO] [stderr]    Compiling weblab-assignment-structure v0.3.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.21s
[INFO] running `Command { std: "docker" "inspect" "4afd372691d63425e70c56608fea5b9fb9278c83fa50485748695fb14087a7eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4afd372691d63425e70c56608fea5b9fb9278c83fa50485748695fb14087a7eb", kill_on_drop: false }`
[INFO] [stdout] 4afd372691d63425e70c56608fea5b9fb9278c83fa50485748695fb14087a7eb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=warn" "-e" "RUSTDOCFLAGS=--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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] da31f53fd370f86003669351c5cc41ce25ba71b19bd46e5a6b908e7346540c4d
[INFO] running `Command { std: "docker" "start" "-a" "da31f53fd370f86003669351c5cc41ce25ba71b19bd46e5a6b908e7346540c4d", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/weblab_assignment_structure-3e8ea67bbc3b6372)
[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] [stderr]    Doc-tests weblab_assignment_structure
[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" "da31f53fd370f86003669351c5cc41ce25ba71b19bd46e5a6b908e7346540c4d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "da31f53fd370f86003669351c5cc41ce25ba71b19bd46e5a6b908e7346540c4d", kill_on_drop: false }`
[INFO] [stdout] da31f53fd370f86003669351c5cc41ce25ba71b19bd46e5a6b908e7346540c4d