[INFO] crate once_cell 1.4.0 is already in cache
[INFO] documenting once_cell-1.4.0 against master#394e1b40d264aa6928811919c1124fa248e7d802 for pr-73566
[INFO] extracting crate once_cell 1.4.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate once_cell 1.4.0 on toolchain 394e1b40d264aa6928811919c1124fa248e7d802
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate once_cell 1.4.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate once_cell 1.4.0
[INFO] tweaked toml for crates.io crate once_cell 1.4.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate once_cell 1.4.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d8dc42a37fa0ad591afbda6123d225614f3d4b6e49bc34462296db84cc054620
[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" "d8dc42a37fa0ad591afbda6123d225614f3d4b6e49bc34462296db84cc054620", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d8dc42a37fa0ad591afbda6123d225614f3d4b6e49bc34462296db84cc054620", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d8dc42a37fa0ad591afbda6123d225614f3d4b6e49bc34462296db84cc054620", kill_on_drop: false }`
[INFO] [stdout] d8dc42a37fa0ad591afbda6123d225614f3d4b6e49bc34462296db84cc054620
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "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] 5fe1fc24530bd242f447d02a8a6471014b4ed7bb190fc5b1269eee47e2eb008e
[INFO] running `Command { std: "docker" "start" "-a" "5fe1fc24530bd242f447d02a8a6471014b4ed7bb190fc5b1269eee47e2eb008e", kill_on_drop: false }`
[INFO] [stderr]  Documenting once_cell v1.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.98s
[INFO] running `Command { std: "docker" "inspect" "5fe1fc24530bd242f447d02a8a6471014b4ed7bb190fc5b1269eee47e2eb008e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5fe1fc24530bd242f447d02a8a6471014b4ed7bb190fc5b1269eee47e2eb008e", kill_on_drop: false }`
[INFO] [stdout] 5fe1fc24530bd242f447d02a8a6471014b4ed7bb190fc5b1269eee47e2eb008e