[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 1.46.0 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-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/laopo001/hello_rust on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "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-8/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" "+1.46.0" "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] 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" "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" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7b486ef030cff8d71fd31ff810e52e30acce2f6be93b97498ecc9af581e53a8e
[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" "7b486ef030cff8d71fd31ff810e52e30acce2f6be93b97498ecc9af581e53a8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7b486ef030cff8d71fd31ff810e52e30acce2f6be93b97498ecc9af581e53a8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b486ef030cff8d71fd31ff810e52e30acce2f6be93b97498ecc9af581e53a8e", kill_on_drop: false }`
[INFO] [stdout] 7b486ef030cff8d71fd31ff810e52e30acce2f6be93b97498ecc9af581e53a8e
[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" "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" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0eb6362df261ebb42189aa848a0f8dedc676eb07f39c33f2adaff8d8ec765028
[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" "0eb6362df261ebb42189aa848a0f8dedc676eb07f39c33f2adaff8d8ec765028", 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]    Compiling log v0.4.8
[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 once_cell v1.3.0
[INFO] [stderr]     Checking futures-io v0.3.1
[INFO] [stderr]    Compiling indexmap v1.3.1
[INFO] [stderr]     Checking lock_api v0.3.3
[INFO] [stderr]     Checking tokio-executor v0.1.9
[INFO] [stderr]     Checking async-task v1.2.1
[INFO] [stderr]     Checking futures-cpupool v0.1.8
[INFO] [stderr]     Checking futures-sink-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking parking_lot v0.9.0
[INFO] [stderr]     Checking tokio-timer v0.2.12
[INFO] [stderr]     Checking tokio-current-thread v0.1.6
[INFO] [stderr]     Checking futures-channel-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]     Checking tokio-io v0.1.12
[INFO] [stderr]     Checking tokio-threadpool v0.1.17
[INFO] [stderr]     Checking want v0.2.0
[INFO] [stderr]     Checking kv-log-macro v1.0.4
[INFO] [stderr]     Checking h2 v0.1.26
[INFO] [stderr]     Checking tokio-reactor v0.1.11
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]     Checking async-std v1.4.0
[INFO] [stderr]     Checking tokio-tcp v0.1.3
[INFO] [stderr]     Checking tokio v0.1.22
[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 lib --crate-name hello_rust src/lib.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-8a3763997d773c7f.rmeta --extern crossbeam_channel=/opt/rustwide/target/debug/deps/libcrossbeam_channel-6f6626dcb6ae4ef6.rmeta --extern futures=/opt/rustwide/target/debug/deps/libfutures-5a825cbf36604b67.rmeta --extern hyper=/opt/rustwide/target/debug/deps/libhyper-3fcd26cbd600a90f.rmeta --cap-lints=warn` (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" "0eb6362df261ebb42189aa848a0f8dedc676eb07f39c33f2adaff8d8ec765028", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0eb6362df261ebb42189aa848a0f8dedc676eb07f39c33f2adaff8d8ec765028", kill_on_drop: false }`
[INFO] [stdout] 0eb6362df261ebb42189aa848a0f8dedc676eb07f39c33f2adaff8d8ec765028