[INFO] fetching crate comments 0.1.0...
[INFO] checking comments-0.1.0 against master#6526e5c772f2da07db745c94ca6bb0a591a39ba4 for pr-80920
[INFO] extracting crate comments 0.1.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate comments 0.1.0 on toolchain 6526e5c772f2da07db745c94ca6bb0a591a39ba4
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate comments 0.1.0
[INFO] finished tweaking crates.io crate comments 0.1.0
[INFO] tweaked toml for crates.io crate comments 0.1.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate comments 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7f88ddb29004d42ad7fee7515611611b080ddc409363d5a6ad9c1c48d12462bd
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "7f88ddb29004d42ad7fee7515611611b080ddc409363d5a6ad9c1c48d12462bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7f88ddb29004d42ad7fee7515611611b080ddc409363d5a6ad9c1c48d12462bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f88ddb29004d42ad7fee7515611611b080ddc409363d5a6ad9c1c48d12462bd", kill_on_drop: false }`
[INFO] [stdout] 7f88ddb29004d42ad7fee7515611611b080ddc409363d5a6ad9c1c48d12462bd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 6d71f95cf2a096cc76cf8fa702f55c2bbf19d96ab18dd53c653213ae8e113189
[INFO] running `Command { std: "docker" "start" "-a" "6d71f95cf2a096cc76cf8fa702f55c2bbf19d96ab18dd53c653213ae8e113189", kill_on_drop: false }`
[INFO] [stderr]     Checking comments v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.18s
[INFO] running `Command { std: "docker" "inspect" "6d71f95cf2a096cc76cf8fa702f55c2bbf19d96ab18dd53c653213ae8e113189", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d71f95cf2a096cc76cf8fa702f55c2bbf19d96ab18dd53c653213ae8e113189", kill_on_drop: false }`
[INFO] [stdout] 6d71f95cf2a096cc76cf8fa702f55c2bbf19d96ab18dd53c653213ae8e113189