[INFO] fetching crate building 0.1.7...
[INFO] documenting building-0.1.7 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate building 0.1.7 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate building 0.1.7 on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate building 0.1.7
[INFO] finished tweaking crates.io crate building 0.1.7
[INFO] tweaked toml for crates.io crate building 0.1.7 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate building 0.1.7 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "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] 7106b0f1b6f5e962367c9b9b7d8c04856773a9116267497aa2f7fe96967ac440
[INFO] running `Command { std: "docker" "start" "-a" "7106b0f1b6f5e962367c9b9b7d8c04856773a9116267497aa2f7fe96967ac440", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7106b0f1b6f5e962367c9b9b7d8c04856773a9116267497aa2f7fe96967ac440", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7106b0f1b6f5e962367c9b9b7d8c04856773a9116267497aa2f7fe96967ac440", kill_on_drop: false }`
[INFO] [stdout] 7106b0f1b6f5e962367c9b9b7d8c04856773a9116267497aa2f7fe96967ac440
[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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "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] 9b869d8d038b9b4a32c8c7690dfc387534d2c6ca1fd1a3a46b63b3ec9e4f0cf9
[INFO] running `Command { std: "docker" "start" "-a" "9b869d8d038b9b4a32c8c7690dfc387534d2c6ca1fd1a3a46b63b3ec9e4f0cf9", kill_on_drop: false }`
[INFO] [stderr]  Documenting building v0.1.7 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.92s
[INFO] running `Command { std: "docker" "inspect" "9b869d8d038b9b4a32c8c7690dfc387534d2c6ca1fd1a3a46b63b3ec9e4f0cf9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9b869d8d038b9b4a32c8c7690dfc387534d2c6ca1fd1a3a46b63b3ec9e4f0cf9", kill_on_drop: false }`
[INFO] [stdout] 9b869d8d038b9b4a32c8c7690dfc387534d2c6ca1fd1a3a46b63b3ec9e4f0cf9