[INFO] cloning repository https://github.com/WhiffyMuffinz/collatz-conj-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/WhiffyMuffinz/collatz-conj-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FWhiffyMuffinz%2Fcollatz-conj-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FWhiffyMuffinz%2Fcollatz-conj-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ec37498c305545f2558ae7b1b5282afa5ce9db96
[INFO] documenting WhiffyMuffinz/collatz-conj-rs against master#e1df625306f4136949e02612406f0c60df6008f3 for pr-96676
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FWhiffyMuffinz%2Fcollatz-conj-rs" "/workspace/builds/worker-42/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-42/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/WhiffyMuffinz/collatz-conj-rs on toolchain e1df625306f4136949e02612406f0c60df6008f3
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+e1df625306f4136949e02612406f0c60df6008f3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/WhiffyMuffinz/collatz-conj-rs
[INFO] finished tweaking git repo https://github.com/WhiffyMuffinz/collatz-conj-rs
[INFO] tweaked toml for git repo https://github.com/WhiffyMuffinz/collatz-conj-rs written to /workspace/builds/worker-42/source/Cargo.toml
[INFO] crate git repo https://github.com/WhiffyMuffinz/collatz-conj-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+e1df625306f4136949e02612406f0c60df6008f3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+e1df625306f4136949e02612406f0c60df6008f3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5efd41a50889a56138db02f31f25cd4b33856f91b5ab90dff16cc0a9b1fc99b9
[INFO] running `Command { std: "docker" "start" "-a" "5efd41a50889a56138db02f31f25cd4b33856f91b5ab90dff16cc0a9b1fc99b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5efd41a50889a56138db02f31f25cd4b33856f91b5ab90dff16cc0a9b1fc99b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5efd41a50889a56138db02f31f25cd4b33856f91b5ab90dff16cc0a9b1fc99b9", kill_on_drop: false }`
[INFO] [stdout] 5efd41a50889a56138db02f31f25cd4b33856f91b5ab90dff16cc0a9b1fc99b9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/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=forbid" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+e1df625306f4136949e02612406f0c60df6008f3" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] beea86f561d87f16adca664a6b51da419dd5e36e64b51d9897a6122e223fb9da
[INFO] running `Command { std: "docker" "start" "-a" "beea86f561d87f16adca664a6b51da419dd5e36e64b51d9897a6122e223fb9da", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] running `Command { std: "docker" "inspect" "beea86f561d87f16adca664a6b51da419dd5e36e64b51d9897a6122e223fb9da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "beea86f561d87f16adca664a6b51da419dd5e36e64b51d9897a6122e223fb9da", kill_on_drop: false }`
[INFO] [stdout] beea86f561d87f16adca664a6b51da419dd5e36e64b51d9897a6122e223fb9da