[INFO] fetching crate huffman_tree 0.1.0...
[INFO] documenting huffman_tree-0.1.0 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate huffman_tree 0.1.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate huffman_tree 0.1.0 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 huffman_tree 0.1.0
[INFO] finished tweaking crates.io crate huffman_tree 0.1.0
[INFO] tweaked toml for crates.io crate huffman_tree 0.1.0 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] [stdout] 6ad57e592acaaae8630f9e65878f534bb5b0cd5b5a5304510329ef8189cd534c
[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" "6ad57e592acaaae8630f9e65878f534bb5b0cd5b5a5304510329ef8189cd534c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6ad57e592acaaae8630f9e65878f534bb5b0cd5b5a5304510329ef8189cd534c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6ad57e592acaaae8630f9e65878f534bb5b0cd5b5a5304510329ef8189cd534c", kill_on_drop: false }`
[INFO] [stdout] 6ad57e592acaaae8630f9e65878f534bb5b0cd5b5a5304510329ef8189cd534c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] aff0908fc89f513c0d23b4b35f035bd70b8a3aa753345b3cb85f928a006f3c00
[INFO] running `Command { std: "docker" "start" "-a" "aff0908fc89f513c0d23b4b35f035bd70b8a3aa753345b3cb85f928a006f3c00", kill_on_drop: false }`
[INFO] [stderr]  Documenting huffman_tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.97s
[INFO] running `Command { std: "docker" "inspect" "aff0908fc89f513c0d23b4b35f035bd70b8a3aa753345b3cb85f928a006f3c00", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aff0908fc89f513c0d23b4b35f035bd70b8a3aa753345b3cb85f928a006f3c00", kill_on_drop: false }`
[INFO] [stdout] aff0908fc89f513c0d23b4b35f035bd70b8a3aa753345b3cb85f928a006f3c00
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+beta-2022-05-20" "rustdoc" "--lib" "-Zrustdoc-map" "--frozen" "--message-format=json" "--" "-Z" "unstable-options" "--document-private-items", 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] 1ce673c54be75b674e0b9200d1f06d256df10f30e5f7ae2295f38562e6020a63
[INFO] running `Command { std: "docker" "start" "-a" "1ce673c54be75b674e0b9200d1f06d256df10f30e5f7ae2295f38562e6020a63", kill_on_drop: false }`
[INFO] [stderr]  Documenting huffman_tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.59s
[INFO] running `Command { std: "docker" "inspect" "1ce673c54be75b674e0b9200d1f06d256df10f30e5f7ae2295f38562e6020a63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ce673c54be75b674e0b9200d1f06d256df10f30e5f7ae2295f38562e6020a63", kill_on_drop: false }`
[INFO] [stdout] 1ce673c54be75b674e0b9200d1f06d256df10f30e5f7ae2295f38562e6020a63