[INFO] fetching crate ns16550a 0.1.0...
[INFO] documenting ns16550a-0.1.0 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate ns16550a 0.1.0 into /workspace/builds/worker-21/source
[INFO] validating manifest of crates.io crate ns16550a 0.1.0 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 ns16550a 0.1.0
[INFO] finished tweaking crates.io crate ns16550a 0.1.0
[INFO] tweaked toml for crates.io crate ns16550a 0.1.0 written to /workspace/builds/worker-21/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "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" "+1.61.0" "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-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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] [stdout] 39a12b3d6b03aa340f95ca74a449ae08f583be7284f87d13fc0b0db680bc7f5e
[INFO] running `Command { std: "docker" "start" "-a" "39a12b3d6b03aa340f95ca74a449ae08f583be7284f87d13fc0b0db680bc7f5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "39a12b3d6b03aa340f95ca74a449ae08f583be7284f87d13fc0b0db680bc7f5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39a12b3d6b03aa340f95ca74a449ae08f583be7284f87d13fc0b0db680bc7f5e", kill_on_drop: false }`
[INFO] [stdout] 39a12b3d6b03aa340f95ca74a449ae08f583be7284f87d13fc0b0db680bc7f5e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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] [stdout] 09975fb480c5ece325d46646a92825adc6347cfb399a87bbe29fd6e1e1800921
[INFO] running `Command { std: "docker" "start" "-a" "09975fb480c5ece325d46646a92825adc6347cfb399a87bbe29fd6e1e1800921", kill_on_drop: false }`
[INFO] [stderr]  Documenting ns16550a v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [optimized + debuginfo] target(s) in 0.85s
[INFO] running `Command { std: "docker" "inspect" "09975fb480c5ece325d46646a92825adc6347cfb399a87bbe29fd6e1e1800921", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09975fb480c5ece325d46646a92825adc6347cfb399a87bbe29fd6e1e1800921", kill_on_drop: false }`
[INFO] [stdout] 09975fb480c5ece325d46646a92825adc6347cfb399a87bbe29fd6e1e1800921
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTC_BOOTSTRAP=1" "-e" "DOCS_RS=1" "-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" "rustdoc" "--lib" "-Zrustdoc-map" "--frozen" "--message-format=json" "--" "-Z" "unstable-options" "--document-private-items", kill_on_drop: false }`
[INFO] [stdout] 600f9eafea56b748724609062ba268f9e029fd52a67bf90220fdf9042d8b5f1a
[INFO] running `Command { std: "docker" "start" "-a" "600f9eafea56b748724609062ba268f9e029fd52a67bf90220fdf9042d8b5f1a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Documenting ns16550a v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [optimized + debuginfo] target(s) in 0.80s
[INFO] running `Command { std: "docker" "inspect" "600f9eafea56b748724609062ba268f9e029fd52a67bf90220fdf9042d8b5f1a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "600f9eafea56b748724609062ba268f9e029fd52a67bf90220fdf9042d8b5f1a", kill_on_drop: false }`
[INFO] [stdout] 600f9eafea56b748724609062ba268f9e029fd52a67bf90220fdf9042d8b5f1a