[INFO] fetching crate flock 0.2.0...
[INFO] documenting flock-0.2.0 against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] extracting crate flock 0.2.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate flock 0.2.0 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate flock 0.2.0
[INFO] finished tweaking crates.io crate flock 0.2.0
[INFO] tweaked toml for crates.io crate flock 0.2.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8e632015b71590bc1ae093adcdca48eca3a03483c2bf766045b24e7aaa6b30ef
[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" "8e632015b71590bc1ae093adcdca48eca3a03483c2bf766045b24e7aaa6b30ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8e632015b71590bc1ae093adcdca48eca3a03483c2bf766045b24e7aaa6b30ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8e632015b71590bc1ae093adcdca48eca3a03483c2bf766045b24e7aaa6b30ef", kill_on_drop: false }`
[INFO] [stdout] 8e632015b71590bc1ae093adcdca48eca3a03483c2bf766045b24e7aaa6b30ef
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2b5f22a71f3813818d3e2c659f2fabcd3fa0cd9d45ce38c458dbe19e7b5b66e4
[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" "2b5f22a71f3813818d3e2c659f2fabcd3fa0cd9d45ce38c458dbe19e7b5b66e4", kill_on_drop: false }`
[INFO] [stderr]     Checking crossbeam v0.2.12
[INFO] [stderr]  Documenting flock v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.62s
[INFO] running `Command { std: "docker" "inspect" "2b5f22a71f3813818d3e2c659f2fabcd3fa0cd9d45ce38c458dbe19e7b5b66e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b5f22a71f3813818d3e2c659f2fabcd3fa0cd9d45ce38c458dbe19e7b5b66e4", kill_on_drop: false }`
[INFO] [stdout] 2b5f22a71f3813818d3e2c659f2fabcd3fa0cd9d45ce38c458dbe19e7b5b66e4
