[INFO] fetching crate extract-frontmatter 1.0.3...
[INFO] checking extract-frontmatter-1.0.3 against try#f6e2f78768c57172b99c3e85892f867894dc7e30 for pr-75502
[INFO] extracting crate extract-frontmatter 1.0.3 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate extract-frontmatter 1.0.3 on toolchain f6e2f78768c57172b99c3e85892f867894dc7e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate extract-frontmatter 1.0.3
[INFO] finished tweaking crates.io crate extract-frontmatter 1.0.3
[INFO] tweaked toml for crates.io crate extract-frontmatter 1.0.3 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:e18d859f9e32a1da89bc7b2d7d51e13b57342044d1295d9fc0dd0068c58eb3d1" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "metadata" "--no-deps" "--format-version=1", 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] 5f291fd5a72d595c0cafdab4f2fb9fcd99c9770cf53bb47887514428e4a85d71
[INFO] running `Command { std: "docker" "start" "-a" "5f291fd5a72d595c0cafdab4f2fb9fcd99c9770cf53bb47887514428e4a85d71", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5f291fd5a72d595c0cafdab4f2fb9fcd99c9770cf53bb47887514428e4a85d71", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f291fd5a72d595c0cafdab4f2fb9fcd99c9770cf53bb47887514428e4a85d71", kill_on_drop: false }`
[INFO] [stdout] 5f291fd5a72d595c0cafdab4f2fb9fcd99c9770cf53bb47887514428e4a85d71
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:e18d859f9e32a1da89bc7b2d7d51e13b57342044d1295d9fc0dd0068c58eb3d1" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8a8056246b659acbae2a0cd33bb36f19773d14d3c5362fdf611f41c344ab4adc
[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" "8a8056246b659acbae2a0cd33bb36f19773d14d3c5362fdf611f41c344ab4adc", kill_on_drop: false }`
[INFO] [stderr]     Checking extract-frontmatter v1.0.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.32s
[INFO] running `Command { std: "docker" "inspect" "8a8056246b659acbae2a0cd33bb36f19773d14d3c5362fdf611f41c344ab4adc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8a8056246b659acbae2a0cd33bb36f19773d14d3c5362fdf611f41c344ab4adc", kill_on_drop: false }`
[INFO] [stdout] 8a8056246b659acbae2a0cd33bb36f19773d14d3c5362fdf611f41c344ab4adc