[INFO] cloning repository https://github.com/tiberiusferreira/Autograd-Experiments
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tiberiusferreira/Autograd-Experiments" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftiberiusferreira%2FAutograd-Experiments", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftiberiusferreira%2FAutograd-Experiments'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 75d59203620a8b6a900bfc1250bc6c9585c7d501
[INFO] documenting tiberiusferreira/Autograd-Experiments against 824336ad4127ce295849937a24c08a4aeff6ada7 for pr-162169
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftiberiusferreira%2FAutograd-Experiments" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/tiberiusferreira/Autograd-Experiments
[INFO] finished tweaking git repo https://github.com/tiberiusferreira/Autograd-Experiments
[INFO] tweaked toml for git repo https://github.com/tiberiusferreira/Autograd-Experiments written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/tiberiusferreira/Autograd-Experiments on toolchain 824336ad4127ce295849937a24c08a4aeff6ada7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+824336ad4127ce295849937a24c08a4aeff6ada7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/tiberiusferreira/Autograd-Experiments 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" "+824336ad4127ce295849937a24c08a4aeff6ada7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: Cargo.toml: file `/workspace/builds/worker-5-tc1/source/examples/simple_training.rs` found to be present in multiple build targets:
[INFO] [stderr]   * `bin` target `simple_training`
[INFO] [stderr]   * `example` target `simple_training`
[INFO] [stderr] warning: `backprop` (manifest) generated 1 warning
[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