[INFO] fetching crate arcmutex 0.2.0...
[INFO] crate arcmutex 0.2.0 is already in cache
[INFO] crate arcmutex 0.2.0 is already in cache
[INFO] crate arcmutex 0.2.0 is already in cache
[INFO] crate arcmutex 0.2.0 is already in cache
[INFO] crate arcmutex 0.2.0 is already in cache
[INFO] crate arcmutex 0.2.0 is already in cache
[INFO] crate arcmutex 0.2.0 is already in cache
[INFO] crate arcmutex 0.2.0 is already in cache
[INFO] crate arcmutex 0.2.0 is already in cache
[INFO] crate arcmutex 0.2.0 is already in cache
[INFO] crate arcmutex 0.2.0 is already in cache
[INFO] crate arcmutex 0.2.0 is already in cache
[INFO] crate arcmutex 0.2.0 is already in cache
[INFO] crate arcmutex 0.2.0 is already in cache
[INFO] checking arcmutex-0.2.0 against try#7b91cbfbcf4c73b95e666e0f8972d2f7262ce27e for pr-99880
[INFO] extracting crate arcmutex 0.2.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate arcmutex 0.2.0 on toolchain 7b91cbfbcf4c73b95e666e0f8972d2f7262ce27e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b91cbfbcf4c73b95e666e0f8972d2f7262ce27e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate arcmutex 0.2.0
[INFO] finished tweaking crates.io crate arcmutex 0.2.0
[INFO] tweaked toml for crates.io crate arcmutex 0.2.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b91cbfbcf4c73b95e666e0f8972d2f7262ce27e" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b91cbfbcf4c73b95e666e0f8972d2f7262ce27e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:ecb52c4cf6672b83cc996368a05b4a059042425f2b6ba9cd23a06cdead5d8d70" "/opt/rustwide/cargo-home/bin/cargo" "+7b91cbfbcf4c73b95e666e0f8972d2f7262ce27e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cf478d653d0b2b49a8a5de4bc016078c2db8fcf151496d72ede42625a9ecd0a9
[INFO] running `Command { std: "docker" "start" "-a" "cf478d653d0b2b49a8a5de4bc016078c2db8fcf151496d72ede42625a9ecd0a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cf478d653d0b2b49a8a5de4bc016078c2db8fcf151496d72ede42625a9ecd0a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cf478d653d0b2b49a8a5de4bc016078c2db8fcf151496d72ede42625a9ecd0a9", kill_on_drop: false }`
[INFO] [stdout] cf478d653d0b2b49a8a5de4bc016078c2db8fcf151496d72ede42625a9ecd0a9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:ecb52c4cf6672b83cc996368a05b4a059042425f2b6ba9cd23a06cdead5d8d70" "/opt/rustwide/cargo-home/bin/cargo" "+7b91cbfbcf4c73b95e666e0f8972d2f7262ce27e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[ERROR] error running command: no output for 300 seconds