[INFO] cloning repository https://github.com/yishiyuntuan/learn
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yishiyuntuan/learn" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyishiyuntuan%2Flearn", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyishiyuntuan%2Flearn'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e4eb3cf82ce9561328b4f0b81846ee5e0f16d902
[INFO] checking yishiyuntuan/learn against d8df82673d5911b6112a85bf91d9adefb2c66a1a for pr-162242
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyishiyuntuan%2Flearn" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/yishiyuntuan/learn
[INFO] finished tweaking git repo https://github.com/yishiyuntuan/learn
[INFO] tweaked toml for git repo https://github.com/yishiyuntuan/learn written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/yishiyuntuan/learn on toolchain d8df82673d5911b6112a85bf91d9adefb2c66a1a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d8df82673d5911b6112a85bf91d9adefb2c66a1a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/yishiyuntuan/learn 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" "+d8df82673d5911b6112a85bf91d9adefb2c66a1a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: unused workspace dependency `chrono`
[INFO] [stderr]   --> Cargo.toml:10:1
[INFO] [stderr]    |
[INFO] [stderr] 10 | chrono = "0.4"
[INFO] [stderr]    | ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `cargo::unused_workspace_dependencies` is set to `warn` by default
[INFO] [stderr] help: consider removing the workspace dependency `chrono`
[INFO] [stderr] warning: unused workspace dependency `env_logger`
[INFO] [stderr]   --> Cargo.toml:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | env_logger = "0.10"
[INFO] [stderr]    | ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] help: consider removing the workspace dependency `env_logger`
[INFO] [stderr] warning: unused workspace dependency `serde_json`
[INFO] [stderr]   --> Cargo.toml:24:1
[INFO] [stderr]    |
[INFO] [stderr] 24 | serde_json = "1.0"
[INFO] [stderr]    | ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] help: consider removing the workspace dependency `serde_json`
[INFO] [stderr] warning: workspace (manifest) generated 3 warnings
[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