[INFO] fetching crate mathl 0.0.2...
[INFO] documenting mathl-0.0.2 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate mathl 0.0.2 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate mathl 0.0.2 on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mathl 0.0.2
[INFO] finished tweaking crates.io crate mathl 0.0.2
[INFO] tweaked toml for crates.io crate mathl 0.0.2 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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-2020-08-29" "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] 296ef8f62a8a6d792cd34e442be1ea8feda3ab7185f6fa4aa42d7bc19f89952a
[INFO] running `Command { std: "docker" "start" "-a" "296ef8f62a8a6d792cd34e442be1ea8feda3ab7185f6fa4aa42d7bc19f89952a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "296ef8f62a8a6d792cd34e442be1ea8feda3ab7185f6fa4aa42d7bc19f89952a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "296ef8f62a8a6d792cd34e442be1ea8feda3ab7185f6fa4aa42d7bc19f89952a", kill_on_drop: false }`
[INFO] [stdout] 296ef8f62a8a6d792cd34e442be1ea8feda3ab7185f6fa4aa42d7bc19f89952a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2dc73059ce228f421491c35ff32a654bb534d0ec24d854c82d355399c0851deb
[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" "2dc73059ce228f421491c35ff32a654bb534d0ec24d854c82d355399c0851deb", kill_on_drop: false }`
[INFO] [stderr]  Documenting mathl v0.0.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.39s
[INFO] running `Command { std: "docker" "inspect" "2dc73059ce228f421491c35ff32a654bb534d0ec24d854c82d355399c0851deb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2dc73059ce228f421491c35ff32a654bb534d0ec24d854c82d355399c0851deb", kill_on_drop: false }`
[INFO] [stdout] 2dc73059ce228f421491c35ff32a654bb534d0ec24d854c82d355399c0851deb