[INFO] fetching crate mct 0.0.1...
[INFO] documenting mct-0.0.1 against master#394e1b40d264aa6928811919c1124fa248e7d802 for pr-73566
[INFO] extracting crate mct 0.0.1 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate mct 0.0.1 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 mct 0.0.1
[INFO] finished tweaking crates.io crate mct 0.0.1
[INFO] tweaked toml for crates.io crate mct 0.0.1 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[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-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" "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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7ff76e2485b1fa18609f34b3682ecbe43a6a75ce5faa941b424e236ebd5594ab
[INFO] running `Command { std: "docker" "start" "-a" "7ff76e2485b1fa18609f34b3682ecbe43a6a75ce5faa941b424e236ebd5594ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7ff76e2485b1fa18609f34b3682ecbe43a6a75ce5faa941b424e236ebd5594ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7ff76e2485b1fa18609f34b3682ecbe43a6a75ce5faa941b424e236ebd5594ab", kill_on_drop: false }`
[INFO] [stdout] 7ff76e2485b1fa18609f34b3682ecbe43a6a75ce5faa941b424e236ebd5594ab
[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" "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] 71da35b5d1672332667c25a53b5688d2d3b5fc226cabcac03677bdd287cd13b8
[INFO] running `Command { std: "docker" "start" "-a" "71da35b5d1672332667c25a53b5688d2d3b5fc226cabcac03677bdd287cd13b8", kill_on_drop: false }`
[INFO] [stderr]  Documenting mct v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.38s
[INFO] running `Command { std: "docker" "inspect" "71da35b5d1672332667c25a53b5688d2d3b5fc226cabcac03677bdd287cd13b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "71da35b5d1672332667c25a53b5688d2d3b5fc226cabcac03677bdd287cd13b8", kill_on_drop: false }`
[INFO] [stdout] 71da35b5d1672332667c25a53b5688d2d3b5fc226cabcac03677bdd287cd13b8