[INFO] crate cargo-xbuild 0.5.34 is already in cache
[INFO] documenting cargo-xbuild-0.5.34 against master#394e1b40d264aa6928811919c1124fa248e7d802 for pr-73566
[INFO] extracting crate cargo-xbuild 0.5.34 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate cargo-xbuild 0.5.34 on toolchain 394e1b40d264aa6928811919c1124fa248e7d802
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cargo-xbuild 0.5.34
[INFO] finished tweaking crates.io crate cargo-xbuild 0.5.34
[INFO] tweaked toml for crates.io crate cargo-xbuild 0.5.34 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate crates.io crate cargo-xbuild 0.5.34 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b5c8416a2e595f73a768ce26fd19c27a81826c0274fb7c39df903ff039c88649
[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" "b5c8416a2e595f73a768ce26fd19c27a81826c0274fb7c39df903ff039c88649", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b5c8416a2e595f73a768ce26fd19c27a81826c0274fb7c39df903ff039c88649", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b5c8416a2e595f73a768ce26fd19c27a81826c0274fb7c39df903ff039c88649", kill_on_drop: false }`
[INFO] [stdout] b5c8416a2e595f73a768ce26fd19c27a81826c0274fb7c39df903ff039c88649
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-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" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 96e65699b2aceac69002ee278a2b5ba0b1e36f962d73e7fb29c8b88c68014cf8
[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" "96e65699b2aceac69002ee278a2b5ba0b1e36f962d73e7fb29c8b88c68014cf8", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.8
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.14
[INFO] [stderr]     Checking semver-parser v0.7.0
[INFO] [stderr]     Checking remove_dir_all v0.5.2
[INFO] [stderr]    Compiling cargo-xbuild v0.5.34 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling error-chain v0.12.2
[INFO] [stderr]     Checking toml v0.5.6
[INFO] [stderr]     Checking libc v0.2.67
[INFO] [stderr]     Checking semver v0.9.0
[INFO] [stderr]     Checking rustc_version v0.2.3
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking fs2 v0.4.3
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking tempdir v0.3.7
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]     Checking cargo_metadata v0.9.1
[INFO] [stderr]  Documenting cargo-xbuild v0.5.34 (/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 --crate-type bin --crate-name cargo_xclippy src/bin/cargo-xclippy.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern xargo_lib=/opt/rustwide/target/debug/deps/libxargo_lib-3d0486d906b5d5fe.rmeta --extern cargo_metadata=/opt/rustwide/target/debug/deps/libcargo_metadata-556e72a22491c072.rmeta --extern error_chain=/opt/rustwide/target/debug/deps/liberror_chain-a1500f6148bbc963.rmeta --extern fs2=/opt/rustwide/target/debug/deps/libfs2-559f6c8085e55387.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-b148797bf89cc4d2.rmeta --extern rustc_version=/opt/rustwide/target/debug/deps/librustc_version-de88d970c7be5de8.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-fda6da158deca5a7.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-615ecd3e75830c79.so --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-3508f957c91f23ff.rmeta --extern tempdir=/opt/rustwide/target/debug/deps/libtempdir-707761086a37f71d.rmeta --extern toml=/opt/rustwide/target/debug/deps/libtoml-4f1b272bc8592276.rmeta --extern walkdir=/opt/rustwide/target/debug/deps/libwalkdir-31dad8e0c3453e13.rmeta --cap-lints=forbid` (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" "96e65699b2aceac69002ee278a2b5ba0b1e36f962d73e7fb29c8b88c68014cf8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "96e65699b2aceac69002ee278a2b5ba0b1e36f962d73e7fb29c8b88c68014cf8", kill_on_drop: false }`
[INFO] [stdout] 96e65699b2aceac69002ee278a2b5ba0b1e36f962d73e7fb29c8b88c68014cf8