[INFO] cloning repository https://github.com/laopo001/hello_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/laopo001/hello_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flaopo001%2Fhello_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flaopo001%2Fhello_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 566439dd8b614a0f3bef66d42455c03d40b81b2b
[INFO] documenting laopo001/hello_rust against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flaopo001%2Fhello_rust" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/laopo001/hello_rust on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/laopo001/hello_rust
[INFO] finished tweaking git repo https://github.com/laopo001/hello_rust
[INFO] tweaked toml for git repo https://github.com/laopo001/hello_rust written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/laopo001/hello_rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tokio-executor v0.1.9
[INFO] [stderr]   Downloaded futures-preview v0.3.0-alpha.17
[INFO] [stderr]   Downloaded lock_api v0.3.3
[INFO] [stderr]   Downloaded tokio-reactor v0.1.11
[INFO] [stderr]   Downloaded tokio-threadpool v0.1.17
[INFO] [stderr]   Downloaded http v0.1.21
[INFO] [stderr]   Downloaded h2 v0.1.26
[INFO] [stderr]   Downloaded futures-util-preview v0.3.0-alpha.17
[INFO] [stderr]   Downloaded futures-core-preview v0.3.0-alpha.17
[INFO] [stderr]   Downloaded memchr v2.3.0
[INFO] [stderr]   Downloaded tokio-timer v0.2.12
[INFO] [stderr]   Downloaded once_cell v1.3.0
[INFO] [stderr]   Downloaded futures-io-preview v0.3.0-alpha.17
[INFO] [stderr]   Downloaded async-std v1.4.0
[INFO] [stderr]   Downloaded async-task v1.2.1
[INFO] [stderr]   Downloaded futures v0.1.29
[INFO] [stderr]   Downloaded indexmap v1.3.1
[INFO] [stderr]   Downloaded hermit-abi v0.1.6
[INFO] [stderr]   Downloaded tokio-sync v0.1.7
[INFO] [stderr]   Downloaded hyper v0.12.35
[INFO] [stderr]   Downloaded futures-executor-preview v0.3.0-alpha.17
[INFO] [stderr]   Downloaded futures-sink-preview v0.3.0-alpha.17
[INFO] [stderr]   Downloaded futures-channel-preview v0.3.0-alpha.17
[INFO] [stderr]   Downloaded pin-project-lite v0.1.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 22f42889b33aadbe6ff1458cf7f56f214ca695ab8d5fa480bce0acbc4b59593e
[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" "22f42889b33aadbe6ff1458cf7f56f214ca695ab8d5fa480bce0acbc4b59593e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "22f42889b33aadbe6ff1458cf7f56f214ca695ab8d5fa480bce0acbc4b59593e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "22f42889b33aadbe6ff1458cf7f56f214ca695ab8d5fa480bce0acbc4b59593e", kill_on_drop: false }`
[INFO] [stdout] 22f42889b33aadbe6ff1458cf7f56f214ca695ab8d5fa480bce0acbc4b59593e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c7676a05171f631d7b1abee7f32ac12766fcff3774010ca227b22fc9ddea9ad9
[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" "c7676a05171f631d7b1abee7f32ac12766fcff3774010ca227b22fc9ddea9ad9", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling memchr v2.3.0
[INFO] [stderr]     Checking futures-core-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking futures-io-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking futures-timer v2.0.2
[INFO] [stderr]     Checking futures-io v0.3.1
[INFO] [stderr]     Checking once_cell v1.3.0
[INFO] [stderr]    Compiling indexmap v1.3.1
[INFO] [stderr]     Checking tokio-executor v0.1.9
[INFO] [stderr]     Checking async-task v1.2.1
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking want v0.2.0
[INFO] [stderr]     Checking futures-cpupool v0.1.8
[INFO] [stderr]     Checking kv-log-macro v1.0.4
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]     Checking parking_lot v0.9.0
[INFO] [stderr]     Checking futures-sink-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking tokio-threadpool v0.1.17
[INFO] [stderr]     Checking tokio-current-thread v0.1.6
[INFO] [stderr]     Checking tokio-timer v0.2.12
[INFO] [stderr]     Checking futures-channel-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking tokio-io v0.1.12
[INFO] [stderr]     Checking http v0.1.21
[INFO] [stderr]     Checking tokio-buf v0.1.1
[INFO] [stderr]     Checking string v0.2.1
[INFO] [stderr]     Checking async-std v1.4.0
[INFO] [stderr]     Checking tokio-reactor v0.1.11
[INFO] [stderr]     Checking tokio-tcp v0.1.3
[INFO] [stderr]     Checking tokio v0.1.22
[INFO] [stderr]     Checking http-body v0.1.0
[INFO] [stderr]     Checking h2 v0.1.26
[INFO] [stderr]     Checking futures-executor-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking futures-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking hyper v0.12.35
[INFO] [stderr]     Checking hello_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting hello_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: Could not document `hello_rust`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name thread2 src/bin/thread2.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern async_std=/opt/rustwide/target/debug/deps/libasync_std-d19d6d6e7eb9e078.rmeta --extern crossbeam_channel=/opt/rustwide/target/debug/deps/libcrossbeam_channel-ae9f92bb8a42952a.rmeta --extern futures=/opt/rustwide/target/debug/deps/libfutures-2de4d5dae4635674.rmeta --extern hello_rust=/opt/rustwide/target/debug/deps/libhello_rust-4012f1346272dc6d.rmeta --extern hyper=/opt/rustwide/target/debug/deps/libhyper-349940d8f115bbba.rmeta --cap-lints=warn --crate-version 0.1.0` (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" "c7676a05171f631d7b1abee7f32ac12766fcff3774010ca227b22fc9ddea9ad9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c7676a05171f631d7b1abee7f32ac12766fcff3774010ca227b22fc9ddea9ad9", kill_on_drop: false }`
[INFO] [stdout] c7676a05171f631d7b1abee7f32ac12766fcff3774010ca227b22fc9ddea9ad9