[INFO] fetching crate md_gen 0.1.0...
[INFO] checking md_gen-0.1.0 against master#18bd2dd5cda08b09ace6e37c1a0312e9b2bb4beb for pr-96970
[INFO] extracting crate md_gen 0.1.0 into /workspace/builds/worker-31/source
[INFO] validating manifest of crates.io crate md_gen 0.1.0 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 crates.io crate md_gen 0.1.0
[INFO] finished tweaking crates.io crate md_gen 0.1.0
[INFO] tweaked toml for crates.io crate md_gen 0.1.0 written to /workspace/builds/worker-31/source/Cargo.toml
[INFO] crate crates.io crate md_gen 0.1.0 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-31/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-31/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] 17e6282dca73efac07d8e5159325c40ff10fdad5b06c2ad32d2efb5bb11dfb9f
[INFO] running `Command { std: "docker" "start" "-a" "17e6282dca73efac07d8e5159325c40ff10fdad5b06c2ad32d2efb5bb11dfb9f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "17e6282dca73efac07d8e5159325c40ff10fdad5b06c2ad32d2efb5bb11dfb9f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "17e6282dca73efac07d8e5159325c40ff10fdad5b06c2ad32d2efb5bb11dfb9f", kill_on_drop: false }`
[INFO] [stdout] 17e6282dca73efac07d8e5159325c40ff10fdad5b06c2ad32d2efb5bb11dfb9f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-31/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-31/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] a762698477a0bf3784cad52bda05bc59e2212823f6134e54c280dbdc53d10a79
[INFO] running `Command { std: "docker" "start" "-a" "a762698477a0bf3784cad52bda05bc59e2212823f6134e54c280dbdc53d10a79", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking md_gen v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.50s
[ERROR] error running command: no output for 300 seconds
[INFO] running `Command { std: "docker" "inspect" "a762698477a0bf3784cad52bda05bc59e2212823f6134e54c280dbdc53d10a79", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a762698477a0bf3784cad52bda05bc59e2212823f6134e54c280dbdc53d10a79", kill_on_drop: false }`
[INFO] [stdout] a762698477a0bf3784cad52bda05bc59e2212823f6134e54c280dbdc53d10a79