[INFO] fetching crate rc_collections 0.1.0...
[INFO] documenting rc_collections-0.1.0 against try#a394c9cd9ec93787f09a7ac445b14cc674a94549 for pr-151918
[INFO] extracting crate rc_collections 0.1.0 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate rc_collections 0.1.0
[INFO] finished tweaking crates.io crate rc_collections 0.1.0
[INFO] tweaked toml for crates.io crate rc_collections 0.1.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rc_collections 0.1.0 on toolchain a394c9cd9ec93787f09a7ac445b14cc674a94549
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a394c9cd9ec93787f09a7ac445b14cc674a94549" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate rc_collections 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a394c9cd9ec93787f09a7ac445b14cc674a94549" "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
[ERROR] error running command: no output for 300 seconds
[INFO] documenting rc_collections-0.1.0 against try#a394c9cd9ec93787f09a7ac445b14cc674a94549 for pr-151918
[INFO] extracting crate rc_collections 0.1.0 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate rc_collections 0.1.0
[INFO] finished tweaking crates.io crate rc_collections 0.1.0
[INFO] tweaked toml for crates.io crate rc_collections 0.1.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rc_collections 0.1.0 on toolchain a394c9cd9ec93787f09a7ac445b14cc674a94549
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a394c9cd9ec93787f09a7ac445b14cc674a94549" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate rc_collections 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a394c9cd9ec93787f09a7ac445b14cc674a94549" "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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:29356a839a4d14451438f794ce8414e707d72405f44418718d724d22562fe786" "/opt/rustwide/cargo-home/bin/cargo" "+a394c9cd9ec93787f09a7ac445b14cc674a94549" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 49a5966b61bd1f4489806dfa22050d2ae0e033bdbb6c1f1d26553933850a17c8
[INFO] running `Command { std: "docker" "start" "-a" "49a5966b61bd1f4489806dfa22050d2ae0e033bdbb6c1f1d26553933850a17c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "49a5966b61bd1f4489806dfa22050d2ae0e033bdbb6c1f1d26553933850a17c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "49a5966b61bd1f4489806dfa22050d2ae0e033bdbb6c1f1d26553933850a17c8", kill_on_drop: false }`
[INFO] [stdout] 49a5966b61bd1f4489806dfa22050d2ae0e033bdbb6c1f1d26553933850a17c8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:29356a839a4d14451438f794ce8414e707d72405f44418718d724d22562fe786" "/opt/rustwide/cargo-home/bin/cargo" "+a394c9cd9ec93787f09a7ac445b14cc674a94549" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] df39535d87efc5738ed3c9f8dcd1ee8f1713238c39f0ed156898e12cad9b0cec
[INFO] running `Command { std: "docker" "start" "-a" "df39535d87efc5738ed3c9f8dcd1ee8f1713238c39f0ed156898e12cad9b0cec", kill_on_drop: false }`
[INFO] [stderr]  Documenting rc_collections v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.45s
[INFO] [stderr]    Generated /opt/rustwide/target/doc/rc_collections/index.html
[INFO] running `Command { std: "docker" "inspect" "df39535d87efc5738ed3c9f8dcd1ee8f1713238c39f0ed156898e12cad9b0cec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df39535d87efc5738ed3c9f8dcd1ee8f1713238c39f0ed156898e12cad9b0cec", kill_on_drop: false }`
[INFO] [stdout] df39535d87efc5738ed3c9f8dcd1ee8f1713238c39f0ed156898e12cad9b0cec
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "RUSTC_BOOTSTRAP=1" "-e" "DOCS_RS=1" "-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@sha256:29356a839a4d14451438f794ce8414e707d72405f44418718d724d22562fe786" "/opt/rustwide/cargo-home/bin/cargo" "+a394c9cd9ec93787f09a7ac445b14cc674a94549" "rustdoc" "--lib" "-Zrustdoc-map" "--config" "build.rustdocflags=[\"--cfg\", \"docsrs\", \"-Z\", \"unstable-options\", \"--document-private-items\"]" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 75be2662103e5036a81f48c52e67f9eff1eaa1664d5b2b480ea81fa1256bf532
[INFO] running `Command { std: "docker" "start" "-a" "75be2662103e5036a81f48c52e67f9eff1eaa1664d5b2b480ea81fa1256bf532", kill_on_drop: false }`
[INFO] [stderr]  Documenting rc_collections v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.65s
[INFO] [stderr]    Generated /opt/rustwide/target/doc/rc_collections/index.html
[INFO] running `Command { std: "docker" "inspect" "75be2662103e5036a81f48c52e67f9eff1eaa1664d5b2b480ea81fa1256bf532", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "75be2662103e5036a81f48c52e67f9eff1eaa1664d5b2b480ea81fa1256bf532", kill_on_drop: false }`
[INFO] [stdout] 75be2662103e5036a81f48c52e67f9eff1eaa1664d5b2b480ea81fa1256bf532