[INFO] fetching crate frontmatter 0.4.0...
[INFO] checking frontmatter-0.4.0 against try#9cfe725f0995b018340c519db1b2f3cf8a7e0631 for pr-81174
[INFO] extracting crate frontmatter 0.4.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate frontmatter 0.4.0 on toolchain 9cfe725f0995b018340c519db1b2f3cf8a7e0631
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate frontmatter 0.4.0
[INFO] finished tweaking crates.io crate frontmatter 0.4.0
[INFO] tweaked toml for crates.io crate frontmatter 0.4.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "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" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bb47f94a7316d676cc243e0c02d59d9cecc28e9a72cc5b3fffb1b104b93030a4
[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" "bb47f94a7316d676cc243e0c02d59d9cecc28e9a72cc5b3fffb1b104b93030a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bb47f94a7316d676cc243e0c02d59d9cecc28e9a72cc5b3fffb1b104b93030a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bb47f94a7316d676cc243e0c02d59d9cecc28e9a72cc5b3fffb1b104b93030a4", kill_on_drop: false }`
[INFO] [stdout] bb47f94a7316d676cc243e0c02d59d9cecc28e9a72cc5b3fffb1b104b93030a4
[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" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] aef306398b65f08b23f678b6bfdfafa4abd92d5540a13b9495b3814e3c51c76d
[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" "aef306398b65f08b23f678b6bfdfafa4abd92d5540a13b9495b3814e3c51c76d", kill_on_drop: false }`
[INFO] [stderr]     Checking linked-hash-map v0.5.4
[INFO] [stderr]     Checking yaml-rust v0.4.5
[INFO] [stderr]     Checking frontmatter v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.53s
[INFO] running `Command { std: "docker" "inspect" "aef306398b65f08b23f678b6bfdfafa4abd92d5540a13b9495b3814e3c51c76d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aef306398b65f08b23f678b6bfdfafa4abd92d5540a13b9495b3814e3c51c76d", kill_on_drop: false }`
[INFO] [stdout] aef306398b65f08b23f678b6bfdfafa4abd92d5540a13b9495b3814e3c51c76d