[INFO] fetching crate channel 0.0.0...
[INFO] documenting channel-0.0.0 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate channel 0.0.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate channel 0.0.0 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 channel 0.0.0
[INFO] finished tweaking crates.io crate channel 0.0.0
[INFO] tweaked toml for crates.io crate channel 0.0.0 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] f2c782d801d36b8099dc3e7fa132b4334a1e74c28b92f2d01eac5122b65d0609
[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" "f2c782d801d36b8099dc3e7fa132b4334a1e74c28b92f2d01eac5122b65d0609", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f2c782d801d36b8099dc3e7fa132b4334a1e74c28b92f2d01eac5122b65d0609", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f2c782d801d36b8099dc3e7fa132b4334a1e74c28b92f2d01eac5122b65d0609", kill_on_drop: false }`
[INFO] [stdout] f2c782d801d36b8099dc3e7fa132b4334a1e74c28b92f2d01eac5122b65d0609
[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] 753cba001b56ad17fe5cd8fabbc39651b006b2273c8f878cb32dd5003780e885
[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" "753cba001b56ad17fe5cd8fabbc39651b006b2273c8f878cb32dd5003780e885", kill_on_drop: false }`
[INFO] [stderr]  Documenting channel v0.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.70s
[INFO] running `Command { std: "docker" "inspect" "753cba001b56ad17fe5cd8fabbc39651b006b2273c8f878cb32dd5003780e885", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "753cba001b56ad17fe5cd8fabbc39651b006b2273c8f878cb32dd5003780e885", kill_on_drop: false }`
[INFO] [stdout] 753cba001b56ad17fe5cd8fabbc39651b006b2273c8f878cb32dd5003780e885
