[INFO] fetching crate cargo-xbuild 0.6.5...
[INFO] documenting cargo-xbuild-0.6.5 against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] extracting crate cargo-xbuild 0.6.5 into /workspace/builds/worker-56/source
[INFO] validating manifest of crates.io crate cargo-xbuild 0.6.5 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cargo-xbuild 0.6.5
[INFO] finished tweaking crates.io crate cargo-xbuild 0.6.5
[INFO] tweaked toml for crates.io crate cargo-xbuild 0.6.5 written to /workspace/builds/worker-56/source/Cargo.toml
[INFO] crate crates.io crate cargo-xbuild 0.6.5 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "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-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 29b90519996ff4d1f67d60d71c5e4fbeef59aadc961d6a822f390d86ce3a3942
[INFO] running `Command { std: "docker" "start" "-a" "29b90519996ff4d1f67d60d71c5e4fbeef59aadc961d6a822f390d86ce3a3942", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "29b90519996ff4d1f67d60d71c5e4fbeef59aadc961d6a822f390d86ce3a3942", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "29b90519996ff4d1f67d60d71c5e4fbeef59aadc961d6a822f390d86ce3a3942", kill_on_drop: false }`
[INFO] [stdout] 29b90519996ff4d1f67d60d71c5e4fbeef59aadc961d6a822f390d86ce3a3942
[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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b610a29c6b7493849a1370a975d2a81505759b0b2ef5e08768873df807753c2c
[INFO] running `Command { std: "docker" "start" "-a" "b610a29c6b7493849a1370a975d2a81505759b0b2ef5e08768873df807753c2c", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.44
[INFO] [stderr]    Compiling serde_derive v1.0.116
[INFO] [stderr]    Compiling libc v0.2.79
[INFO] [stderr]    Compiling serde v1.0.116
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]    Compiling serde_json v1.0.59
[INFO] [stderr]     Checking ppv-lite86 v0.2.9
[INFO] [stderr]    Compiling anyhow v1.0.33
[INFO] [stderr]     Checking itoa v0.4.6
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]    Compiling cargo-xbuild v0.6.5 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking semver v0.9.0
[INFO] [stderr]     Checking walkdir v2.3.1
[INFO] [stderr]     Checking rustc_version v0.2.3
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking semver v0.10.0
[INFO] [stderr]     Checking toml v0.5.7
[INFO] [stderr]     Checking cargo_metadata v0.11.4
[INFO] [stderr]  Documenting cargo-xbuild v0.6.5 (/opt/rustwide/workdir)
[INFO] [stderr] error: could not document `cargo-xbuild`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name cargo_xinstall src/bin/cargo-xinstall.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern anyhow=/opt/rustwide/target/debug/deps/libanyhow-10463d6f10988168.rmeta --extern xargo_lib=/opt/rustwide/target/debug/deps/libxargo_lib-e1f9b740ac42e220.rmeta --extern cargo_metadata=/opt/rustwide/target/debug/deps/libcargo_metadata-ee0610a5c5a6a681.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-884137e6dd6edd89.rmeta --extern rustc_version=/opt/rustwide/target/debug/deps/librustc_version-27a1b857e737cb48.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-8f34b2169aeaf9cf.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-0f82263703dc8142.rmeta --extern tempfile=/opt/rustwide/target/debug/deps/libtempfile-dc3dcc651b82f152.rmeta --extern toml=/opt/rustwide/target/debug/deps/libtoml-1a8057bb8bdfedf4.rmeta --extern walkdir=/opt/rustwide/target/debug/deps/libwalkdir-13b8c5703ff5c619.rmeta --cap-lints=warn --crate-version 0.6.5` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "b610a29c6b7493849a1370a975d2a81505759b0b2ef5e08768873df807753c2c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b610a29c6b7493849a1370a975d2a81505759b0b2ef5e08768873df807753c2c", kill_on_drop: false }`
[INFO] [stdout] b610a29c6b7493849a1370a975d2a81505759b0b2ef5e08768873df807753c2c
