[INFO] cloning repository https://github.com/deliangyang/leetcode.rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/deliangyang/leetcode.rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdeliangyang%2Fleetcode.rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdeliangyang%2Fleetcode.rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 443aaa4bd7a08b8686b4ea70433c7c28c60b2492
[INFO] documenting deliangyang/leetcode.rs 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%2Fdeliangyang%2Fleetcode.rs" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/deliangyang/leetcode.rs 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/deliangyang/leetcode.rs
[INFO] finished tweaking git repo https://github.com/deliangyang/leetcode.rs
[INFO] tweaked toml for git repo https://github.com/deliangyang/leetcode.rs written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/deliangyang/leetcode.rs 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 282af7d08f9595354c4930291d3fe2b13db514b345848fa54c7d3486c3feb88a
[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" "282af7d08f9595354c4930291d3fe2b13db514b345848fa54c7d3486c3feb88a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "282af7d08f9595354c4930291d3fe2b13db514b345848fa54c7d3486c3feb88a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "282af7d08f9595354c4930291d3fe2b13db514b345848fa54c7d3486c3feb88a", kill_on_drop: false }`
[INFO] [stdout] 282af7d08f9595354c4930291d3fe2b13db514b345848fa54c7d3486c3feb88a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 9fe23acfaf61b61b4e7490edf2e75c78cb5af7872b08c1acbdceebc89b3db1ae
[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" "9fe23acfaf61b61b4e7490edf2e75c78cb5af7872b08c1acbdceebc89b3db1ae", kill_on_drop: false }`
[INFO] [stderr]     Checking demo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting demo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: Could not document `demo`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name longest_valid_parentheses src/bin/longest_valid_parentheses.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern demo=/opt/rustwide/target/debug/deps/libdemo-af49bd78f5e820f8.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" "9fe23acfaf61b61b4e7490edf2e75c78cb5af7872b08c1acbdceebc89b3db1ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9fe23acfaf61b61b4e7490edf2e75c78cb5af7872b08c1acbdceebc89b3db1ae", kill_on_drop: false }`
[INFO] [stdout] 9fe23acfaf61b61b4e7490edf2e75c78cb5af7872b08c1acbdceebc89b3db1ae