[INFO] fetching crate sw-composite 0.7.12...
[INFO] documenting sw-composite-0.7.12 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate sw-composite 0.7.12 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate sw-composite 0.7.12 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 crates.io crate sw-composite 0.7.12
[INFO] finished tweaking crates.io crate sw-composite 0.7.12
[INFO] tweaked toml for crates.io crate sw-composite 0.7.12 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--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" "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] 5a3f666bf6d58f7614e8f86e196d5250dcb4f2b5f529b7b28d4a6416833e0cfc
[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" "5a3f666bf6d58f7614e8f86e196d5250dcb4f2b5f529b7b28d4a6416833e0cfc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5a3f666bf6d58f7614e8f86e196d5250dcb4f2b5f529b7b28d4a6416833e0cfc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5a3f666bf6d58f7614e8f86e196d5250dcb4f2b5f529b7b28d4a6416833e0cfc", kill_on_drop: false }`
[INFO] [stdout] 5a3f666bf6d58f7614e8f86e196d5250dcb4f2b5f529b7b28d4a6416833e0cfc
[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" "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] d32384d9cf926e6b0440571dc0c2decafd0c16d04b0e348cbd42ad078a60b9f0
[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" "d32384d9cf926e6b0440571dc0c2decafd0c16d04b0e348cbd42ad078a60b9f0", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Documenting sw-composite v0.7.12 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.58s
[INFO] running `Command { std: "docker" "inspect" "d32384d9cf926e6b0440571dc0c2decafd0c16d04b0e348cbd42ad078a60b9f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d32384d9cf926e6b0440571dc0c2decafd0c16d04b0e348cbd42ad078a60b9f0", kill_on_drop: false }`
[INFO] [stdout] d32384d9cf926e6b0440571dc0c2decafd0c16d04b0e348cbd42ad078a60b9f0