[INFO] crate concurrency 4.20.1 is already in cache
[INFO] checking concurrency-4.20.1 against try#89c05fd3cc6404a13e1bd71450c6132a2755fa4b for pr-69741
[INFO] extracting crate concurrency 4.20.1 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate concurrency 4.20.1 on toolchain 89c05fd3cc6404a13e1bd71450c6132a2755fa4b
[INFO] running `"/workspace/cargo-home/bin/cargo" "+89c05fd3cc6404a13e1bd71450c6132a2755fa4b" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate concurrency 4.20.1
[INFO] finished tweaking crates.io crate concurrency 4.20.1
[INFO] tweaked toml for crates.io crate concurrency 4.20.1 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate crates.io crate concurrency 4.20.1 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+89c05fd3cc6404a13e1bd71450c6132a2755fa4b" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+89c05fd3cc6404a13e1bd71450c6132a2755fa4b" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 8a009fde7544dc66a8c0a2d0c7a615ce3ad80761a8dbb86c6b87087227b8c261
[INFO] running `"docker" "start" "-a" "8a009fde7544dc66a8c0a2d0c7a615ce3ad80761a8dbb86c6b87087227b8c261"`
[INFO] [stderr]     Checking concurrency v4.20.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.25s
[INFO] running `"docker" "inspect" "8a009fde7544dc66a8c0a2d0c7a615ce3ad80761a8dbb86c6b87087227b8c261"`
[INFO] running `"docker" "rm" "-f" "8a009fde7544dc66a8c0a2d0c7a615ce3ad80761a8dbb86c6b87087227b8c261"`
[INFO] [stdout] 8a009fde7544dc66a8c0a2d0c7a615ce3ad80761a8dbb86c6b87087227b8c261