[INFO] fetching crate proposer-metrics 0.0.0...
[INFO] documenting proposer-metrics-0.0.0 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate proposer-metrics 0.0.0 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate proposer-metrics 0.0.0 on toolchain beta-2022-05-20
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate proposer-metrics 0.0.0
[INFO] finished tweaking crates.io crate proposer-metrics 0.0.0
[INFO] tweaked toml for crates.io crate proposer-metrics 0.0.0 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate crates.io crate proposer-metrics 0.0.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] d5f404aab8a9258c05f0a3ff8db943165b263df2c922346f000171e33043b701
[INFO] running `Command { std: "docker" "start" "-a" "d5f404aab8a9258c05f0a3ff8db943165b263df2c922346f000171e33043b701", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d5f404aab8a9258c05f0a3ff8db943165b263df2c922346f000171e33043b701", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d5f404aab8a9258c05f0a3ff8db943165b263df2c922346f000171e33043b701", kill_on_drop: false }`
[INFO] [stdout] d5f404aab8a9258c05f0a3ff8db943165b263df2c922346f000171e33043b701
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 16a507a5c38e7d86515e9cfd0e6dd4f92157357a82d0099af28f3c1c9f6100c7
[INFO] running `Command { std: "docker" "start" "-a" "16a507a5c38e7d86515e9cfd0e6dd4f92157357a82d0099af28f3c1c9f6100c7", kill_on_drop: false }`
[INFO] [stderr]  Documenting proposer-metrics v0.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.90s
[INFO] running `Command { std: "docker" "inspect" "16a507a5c38e7d86515e9cfd0e6dd4f92157357a82d0099af28f3c1c9f6100c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "16a507a5c38e7d86515e9cfd0e6dd4f92157357a82d0099af28f3c1c9f6100c7", kill_on_drop: false }`
[INFO] [stdout] 16a507a5c38e7d86515e9cfd0e6dd4f92157357a82d0099af28f3c1c9f6100c7