[INFO] fetching crate futures-mockstream 0.1.2...
[INFO] documenting futures-mockstream-0.1.2 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate futures-mockstream 0.1.2 into /workspace/builds/worker-56/source
[INFO] validating manifest of crates.io crate futures-mockstream 0.1.2 on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate futures-mockstream 0.1.2
[INFO] finished tweaking crates.io crate futures-mockstream 0.1.2
[INFO] tweaked toml for crates.io crate futures-mockstream 0.1.2 written to /workspace/builds/worker-56/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "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" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 73a965df9ce4eee62f6b6b18c74682b80699ad5ae873d937959fe05d6b17d707
[INFO] running `Command { std: "docker" "start" "-a" "73a965df9ce4eee62f6b6b18c74682b80699ad5ae873d937959fe05d6b17d707", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "73a965df9ce4eee62f6b6b18c74682b80699ad5ae873d937959fe05d6b17d707", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "73a965df9ce4eee62f6b6b18c74682b80699ad5ae873d937959fe05d6b17d707", kill_on_drop: false }`
[INFO] [stdout] 73a965df9ce4eee62f6b6b18c74682b80699ad5ae873d937959fe05d6b17d707
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2e78fbb2416cd0f6fa53493d0dd58b25d234dd1eadb369f8207c9343ad3121ce
[INFO] running `Command { std: "docker" "start" "-a" "2e78fbb2416cd0f6fa53493d0dd58b25d234dd1eadb369f8207c9343ad3121ce", kill_on_drop: false }`
[INFO] [stderr]    Compiling futures-core v0.3.21
[INFO] [stderr]    Compiling futures-task v0.3.21
[INFO] [stderr]     Checking futures-io v0.3.21
[INFO] [stderr]  Documenting futures-mockstream v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.46s
[INFO] running `Command { std: "docker" "inspect" "2e78fbb2416cd0f6fa53493d0dd58b25d234dd1eadb369f8207c9343ad3121ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e78fbb2416cd0f6fa53493d0dd58b25d234dd1eadb369f8207c9343ad3121ce", kill_on_drop: false }`
[INFO] [stdout] 2e78fbb2416cd0f6fa53493d0dd58b25d234dd1eadb369f8207c9343ad3121ce
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/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=warn" "-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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "rustdoc" "--lib" "-Zrustdoc-map" "--frozen" "--message-format=json" "--" "-Z" "unstable-options" "--document-private-items", kill_on_drop: false }`
[INFO] [stdout] e15746d0503c4e71d8b1447754374467ba4125145429c9f00a98eb6a3e6095b8
[INFO] running `Command { std: "docker" "start" "-a" "e15746d0503c4e71d8b1447754374467ba4125145429c9f00a98eb6a3e6095b8", kill_on_drop: false }`
[ERROR] error running command: no output for 300 seconds
[INFO] running `Command { std: "docker" "inspect" "e15746d0503c4e71d8b1447754374467ba4125145429c9f00a98eb6a3e6095b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e15746d0503c4e71d8b1447754374467ba4125145429c9f00a98eb6a3e6095b8", kill_on_drop: false }`
[INFO] [stdout] e15746d0503c4e71d8b1447754374467ba4125145429c9f00a98eb6a3e6095b8