[INFO] cloning repository https://github.com/mattmarshall/miniservo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mattmarshall/miniservo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmattmarshall%2Fminiservo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmattmarshall%2Fminiservo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 857a8639a77abbcd3acd70418b8f1aa55b844fec
[INFO] checking mattmarshall/miniservo/857a8639a77abbcd3acd70418b8f1aa55b844fec against master#f28ac764c36004fa6a6e098d15b4016a838c13c6 for pr-158320
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmattmarshall%2Fminiservo" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-5-tc1/source/.cargo/config.toml
[INFO] removed /workspace/builds/worker-5-tc1/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/mattmarshall/miniservo
[INFO] finished tweaking git repo https://github.com/mattmarshall/miniservo
[INFO] tweaked toml for git repo https://github.com/mattmarshall/miniservo written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mattmarshall/miniservo on toolchain f28ac764c36004fa6a6e098d15b4016a838c13c6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f28ac764c36004fa6a6e098d15b4016a838c13c6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/mattmarshall/miniservo already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f28ac764c36004fa6a6e098d15b4016a838c13c6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/servo/servo`
[ERROR] error running command: no output for 300 seconds


overridden task result to prepare-fail:timeout

Caused by:
    0: uncategorized prepare error
    1: no output for 300 seconds