[INFO] fetching crate basic-tutorial 0.1.0...
[INFO] documenting basic-tutorial-0.1.0 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate basic-tutorial 0.1.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate basic-tutorial 0.1.0 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate basic-tutorial 0.1.0
[INFO] finished tweaking crates.io crate basic-tutorial 0.1.0
[INFO] tweaked toml for crates.io crate basic-tutorial 0.1.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 35078b661ed6abdec8ebb5291dfea8f248d35a23d073abe0d7757f3301badfb0
[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" "35078b661ed6abdec8ebb5291dfea8f248d35a23d073abe0d7757f3301badfb0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "35078b661ed6abdec8ebb5291dfea8f248d35a23d073abe0d7757f3301badfb0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "35078b661ed6abdec8ebb5291dfea8f248d35a23d073abe0d7757f3301badfb0", kill_on_drop: false }`
[INFO] [stdout] 35078b661ed6abdec8ebb5291dfea8f248d35a23d073abe0d7757f3301badfb0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+1.54.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9154008852e73e58818518d3d8c23359f932c8cb0a8848ce140899ab660b87e5
[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" "9154008852e73e58818518d3d8c23359f932c8cb0a8848ce140899ab660b87e5", kill_on_drop: false }`
[INFO] [stderr]     Checking basic-tutorial v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting basic-tutorial v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/function_test.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     { x + y }
[INFO] [stdout]    |     ^^^^^^^^^ help: remove these braces
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_braces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not document `basic-tutorial`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name panic_test src/panic_test.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern basic_tutorial=/opt/rustwide/target/debug/deps/libbasic_tutorial-2acae1b647176807.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] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "9154008852e73e58818518d3d8c23359f932c8cb0a8848ce140899ab660b87e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9154008852e73e58818518d3d8c23359f932c8cb0a8848ce140899ab660b87e5", kill_on_drop: false }`
[INFO] [stdout] 9154008852e73e58818518d3d8c23359f932c8cb0a8848ce140899ab660b87e5