[INFO] fetching crate periphery 0.1.0...
[INFO] documenting periphery-0.1.0 against 1.46.0 for beta-1.47-rustdoc-1
[INFO] extracting crate periphery 0.1.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate periphery 0.1.0 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 crates.io crate periphery 0.1.0
[INFO] finished tweaking crates.io crate periphery 0.1.0
[INFO] tweaked toml for crates.io crate periphery 0.1.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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-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" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1dd88780a65e5ac1713b7ae86875bd9e1477c8d5fcd0c45241d1e9ac6ca8ff46
[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" "1dd88780a65e5ac1713b7ae86875bd9e1477c8d5fcd0c45241d1e9ac6ca8ff46", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1dd88780a65e5ac1713b7ae86875bd9e1477c8d5fcd0c45241d1e9ac6ca8ff46", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1dd88780a65e5ac1713b7ae86875bd9e1477c8d5fcd0c45241d1e9ac6ca8ff46", kill_on_drop: false }`
[INFO] [stdout] 1dd88780a65e5ac1713b7ae86875bd9e1477c8d5fcd0c45241d1e9ac6ca8ff46
[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" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f1d91a0c2f87611f843aba5b5544e28b430c26545490f132feb14b5d02d8f538
[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" "f1d91a0c2f87611f843aba5b5544e28b430c26545490f132feb14b5d02d8f538", kill_on_drop: false }`
[INFO] [stderr]  Documenting periphery v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.99s
[INFO] running `Command { std: "docker" "inspect" "f1d91a0c2f87611f843aba5b5544e28b430c26545490f132feb14b5d02d8f538", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f1d91a0c2f87611f843aba5b5544e28b430c26545490f132feb14b5d02d8f538", kill_on_drop: false }`
[INFO] [stdout] f1d91a0c2f87611f843aba5b5544e28b430c26545490f132feb14b5d02d8f538