[INFO] cloning repository https://github.com/mzmt/rust_calculator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mzmt/rust_calculator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmzmt%2Frust_calculator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmzmt%2Frust_calculator'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2f9fd57c48722894d048ea99e7a13aaea3f1c75a
[INFO] checking mzmt/rust_calculator against master#2aabf3ce0569dd7c8c2d2a27944850056dcf2566 for pr-156508
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmzmt%2Frust_calculator" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] [stderr] Updating files:  70% (923/1316)
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Updating files: 100% (1316/1316)
Updating files: 100% (1316/1316), done.
[INFO] started tweaking git repo https://github.com/mzmt/rust_calculator
[INFO] finished tweaking git repo https://github.com/mzmt/rust_calculator
[INFO] tweaked toml for git repo https://github.com/mzmt/rust_calculator written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mzmt/rust_calculator on toolchain 2aabf3ce0569dd7c8c2d2a27944850056dcf2566
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2aabf3ce0569dd7c8c2d2a27944850056dcf2566" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/mzmt/rust_calculator 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" "+2aabf3ce0569dd7c8c2d2a27944850056dcf2566" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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