[INFO] fetching crate extract-frontmatter 2.1.0...
[INFO] documenting extract-frontmatter-2.1.0 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate extract-frontmatter 2.1.0 into /workspace/builds/worker-89/source
[INFO] validating manifest of crates.io crate extract-frontmatter 2.1.0 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate extract-frontmatter 2.1.0
[INFO] finished tweaking crates.io crate extract-frontmatter 2.1.0
[INFO] tweaked toml for crates.io crate extract-frontmatter 2.1.0 written to /workspace/builds/worker-89/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-89/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-89/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8b03df646b29b20dde77b6c7020ead929e19df44cad9c0e2258410b989832141
[INFO] running `Command { std: "docker" "start" "-a" "8b03df646b29b20dde77b6c7020ead929e19df44cad9c0e2258410b989832141", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8b03df646b29b20dde77b6c7020ead929e19df44cad9c0e2258410b989832141", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8b03df646b29b20dde77b6c7020ead929e19df44cad9c0e2258410b989832141", kill_on_drop: false }`
[INFO] [stdout] 8b03df646b29b20dde77b6c7020ead929e19df44cad9c0e2258410b989832141
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-89/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-89/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" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 55d6a9cfe662ab7e7bec8f3fd333c7c6e31ab27bc8873b2b96c05fb6358d8219
[INFO] running `Command { std: "docker" "start" "-a" "55d6a9cfe662ab7e7bec8f3fd333c7c6e31ab27bc8873b2b96c05fb6358d8219", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Documenting extract-frontmatter v2.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.52s
[INFO] running `Command { std: "docker" "inspect" "55d6a9cfe662ab7e7bec8f3fd333c7c6e31ab27bc8873b2b96c05fb6358d8219", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "55d6a9cfe662ab7e7bec8f3fd333c7c6e31ab27bc8873b2b96c05fb6358d8219", kill_on_drop: false }`
[INFO] [stdout] 55d6a9cfe662ab7e7bec8f3fd333c7c6e31ab27bc8873b2b96c05fb6358d8219
