[INFO] fetching crate specs 0.18.0...
[INFO] checking specs-0.18.0 against master#4bd30785eb6e55f317b41b7c278f438807eeb174 for pr-102737
[INFO] extracting crate specs 0.18.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate specs 0.18.0 on toolchain 4bd30785eb6e55f317b41b7c278f438807eeb174
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4bd30785eb6e55f317b41b7c278f438807eeb174" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate specs 0.18.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate specs 0.18.0
[INFO] tweaked toml for crates.io crate specs 0.18.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate specs 0.18.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4bd30785eb6e55f317b41b7c278f438807eeb174" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tuple_utils v0.4.0
[INFO] [stderr]   Downloaded shred v0.13.0
[INFO] [stderr]   Downloaded bytemuck v1.10.0
[INFO] [stderr]   Downloaded syn v1.0.67
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:824c28ce115f6b999260af6986f3384c158e782489540e41c0b698ca1d9fd927" "/opt/rustwide/cargo-home/bin/cargo" "+4bd30785eb6e55f317b41b7c278f438807eeb174" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 28bf04632e5016bf245ecda0066124b1cea46556a848f5ce5355a5a57388b5e9
[INFO] running `Command { std: "docker" "start" "-a" "28bf04632e5016bf245ecda0066124b1cea46556a848f5ce5355a5a57388b5e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "28bf04632e5016bf245ecda0066124b1cea46556a848f5ce5355a5a57388b5e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "28bf04632e5016bf245ecda0066124b1cea46556a848f5ce5355a5a57388b5e9", kill_on_drop: false }`
[INFO] [stdout] 28bf04632e5016bf245ecda0066124b1cea46556a848f5ce5355a5a57388b5e9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:824c28ce115f6b999260af6986f3384c158e782489540e41c0b698ca1d9fd927" "/opt/rustwide/cargo-home/bin/cargo" "+4bd30785eb6e55f317b41b7c278f438807eeb174" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[ERROR] error running command: no output for 300 seconds