[INFO] cloning repository https://github.com/dzung-nm/mnist-conv-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dzung-nm/mnist-conv-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdzung-nm%2Fmnist-conv-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdzung-nm%2Fmnist-conv-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f3f63375bfe5f660ef951e3059e1c817e85e6a8c
[INFO] checking dzung-nm/mnist-conv-rust against 8d1a76430406c877b35d0b627e7f796dcf0dfeca+rustflags=-Aunfulfilled-lint-expectations for pr-163637
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdzung-nm%2Fmnist-conv-rust" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
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Updating files: 100% (58/58), done.
[INFO] started tweaking git repo https://github.com/dzung-nm/mnist-conv-rust
[INFO] finished tweaking git repo https://github.com/dzung-nm/mnist-conv-rust
[INFO] tweaked toml for git repo https://github.com/dzung-nm/mnist-conv-rust written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/dzung-nm/mnist-conv-rust on toolchain 8d1a76430406c877b35d0b627e7f796dcf0dfeca
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8d1a76430406c877b35d0b627e7f796dcf0dfeca" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/dzung-nm/mnist-conv-rust 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" "+8d1a76430406c877b35d0b627e7f796dcf0dfeca" "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