[INFO] fetching crate uu_fmt 0.0.1...
[INFO] documenting uu_fmt-0.0.1 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate uu_fmt 0.0.1 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate uu_fmt 0.0.1 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 uu_fmt 0.0.1
[INFO] finished tweaking crates.io crate uu_fmt 0.0.1
[INFO] tweaked toml for crates.io crate uu_fmt 0.0.1 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate uu_fmt 0.0.1 already has a lockfile, it will not be regenerated
[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-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] [stdout] bf4491756647f8cedb62a701e212437ec8f7eb6ccd42f6791c27edf01bffc304
[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" "bf4491756647f8cedb62a701e212437ec8f7eb6ccd42f6791c27edf01bffc304", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bf4491756647f8cedb62a701e212437ec8f7eb6ccd42f6791c27edf01bffc304", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bf4491756647f8cedb62a701e212437ec8f7eb6ccd42f6791c27edf01bffc304", kill_on_drop: false }`
[INFO] [stdout] bf4491756647f8cedb62a701e212437ec8f7eb6ccd42f6791c27edf01bffc304
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] dd93c512e96ec74f87a3250ef6b3341a0f4ee3f6369032b6b23fd0fc37c43af8
[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" "dd93c512e96ec74f87a3250ef6b3341a0f4ee3f6369032b6b23fd0fc37c43af8", kill_on_drop: false }`
[INFO] [stderr]     Checking uu_fmt v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting uu_fmt v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.63s
[INFO] running `Command { std: "docker" "inspect" "dd93c512e96ec74f87a3250ef6b3341a0f4ee3f6369032b6b23fd0fc37c43af8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dd93c512e96ec74f87a3250ef6b3341a0f4ee3f6369032b6b23fd0fc37c43af8", kill_on_drop: false }`
[INFO] [stdout] dd93c512e96ec74f87a3250ef6b3341a0f4ee3f6369032b6b23fd0fc37c43af8