[INFO] cloning repository https://github.com/paulstey/rustlings-course
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/paulstey/rustlings-course" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpaulstey%2Frustlings-course", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpaulstey%2Frustlings-course'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8a457880ccff8fec6c23ff1595bfcd1ca02e41f5
[INFO] checking paulstey/rustlings-course against master#18bd2dd5cda08b09ace6e37c1a0312e9b2bb4beb for pr-96970
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpaulstey%2Frustlings-course" "/workspace/builds/worker-20/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-20/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/paulstey/rustlings-course on toolchain 18bd2dd5cda08b09ace6e37c1a0312e9b2bb4beb
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+18bd2dd5cda08b09ace6e37c1a0312e9b2bb4beb" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/paulstey/rustlings-course
[INFO] finished tweaking git repo https://github.com/paulstey/rustlings-course
[INFO] tweaked toml for git repo https://github.com/paulstey/rustlings-course written to /workspace/builds/worker-20/source/Cargo.toml
[INFO] crate git repo https://github.com/paulstey/rustlings-course already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+18bd2dd5cda08b09ace6e37c1a0312e9b2bb4beb" "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-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+18bd2dd5cda08b09ace6e37c1a0312e9b2bb4beb" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7831eee35e067dc4a217fdcb86d0884c410112a58b59e457201c5d817e2a920f
[INFO] running `Command { std: "docker" "start" "-a" "7831eee35e067dc4a217fdcb86d0884c410112a58b59e457201c5d817e2a920f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7831eee35e067dc4a217fdcb86d0884c410112a58b59e457201c5d817e2a920f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7831eee35e067dc4a217fdcb86d0884c410112a58b59e457201c5d817e2a920f", kill_on_drop: false }`
[INFO] [stdout] 7831eee35e067dc4a217fdcb86d0884c410112a58b59e457201c5d817e2a920f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/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" "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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+18bd2dd5cda08b09ace6e37c1a0312e9b2bb4beb" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b1bd3e4d3a5a0e864360f53de462c7d093763938e838ad8de616d3a6117128b5
[INFO] running `Command { std: "docker" "start" "-a" "b1bd3e4d3a5a0e864360f53de462c7d093763938e838ad8de616d3a6117128b5", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] running `Command { std: "docker" "inspect" "b1bd3e4d3a5a0e864360f53de462c7d093763938e838ad8de616d3a6117128b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b1bd3e4d3a5a0e864360f53de462c7d093763938e838ad8de616d3a6117128b5", kill_on_drop: false }`
[INFO] [stdout] b1bd3e4d3a5a0e864360f53de462c7d093763938e838ad8de616d3a6117128b5