[INFO] fetching crate decision_tree 0.1.0...
[INFO] documenting decision_tree-0.1.0 against beta-2020-10-09 for beta-1.48-rustdoc-1
[INFO] extracting crate decision_tree 0.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate decision_tree 0.1.0 on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate decision_tree 0.1.0
[INFO] finished tweaking crates.io crate decision_tree 0.1.0
[INFO] tweaked toml for crates.io crate decision_tree 0.1.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 00bdd601a94c4abfe311cf84ae1808b4da28ea9e3722b26f72b185bc0abe5e7b
[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" "00bdd601a94c4abfe311cf84ae1808b4da28ea9e3722b26f72b185bc0abe5e7b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "00bdd601a94c4abfe311cf84ae1808b4da28ea9e3722b26f72b185bc0abe5e7b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "00bdd601a94c4abfe311cf84ae1808b4da28ea9e3722b26f72b185bc0abe5e7b", kill_on_drop: false }`
[INFO] [stdout] 00bdd601a94c4abfe311cf84ae1808b4da28ea9e3722b26f72b185bc0abe5e7b
[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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 767c63e85d1fe7292206b18bd4c5f562410d94f2429b1d4cfd478c7f95158072
[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" "767c63e85d1fe7292206b18bd4c5f562410d94f2429b1d4cfd478c7f95158072", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr]  Documenting decision_tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.42s
[INFO] running `Command { std: "docker" "inspect" "767c63e85d1fe7292206b18bd4c5f562410d94f2429b1d4cfd478c7f95158072", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "767c63e85d1fe7292206b18bd4c5f562410d94f2429b1d4cfd478c7f95158072", kill_on_drop: false }`
[INFO] [stdout] 767c63e85d1fe7292206b18bd4c5f562410d94f2429b1d4cfd478c7f95158072
