[INFO] cloning repository https://github.com/osobiehl/rust-for-cpp-devs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/osobiehl/rust-for-cpp-devs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fosobiehl%2Frust-for-cpp-devs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fosobiehl%2Frust-for-cpp-devs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e9907d34e928e4e76d215da9c2af268639f35b8e
[INFO] checking osobiehl/rust-for-cpp-devs against master#ddaf12390d3ffb7d5ba74491a48f3cd528e5d777 for pr-146504
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fosobiehl%2Frust-for-cpp-devs" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/osobiehl/rust-for-cpp-devs
[INFO] finished tweaking git repo https://github.com/osobiehl/rust-for-cpp-devs
[INFO] tweaked toml for git repo https://github.com/osobiehl/rust-for-cpp-devs written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/osobiehl/rust-for-cpp-devs on toolchain ddaf12390d3ffb7d5ba74491a48f3cd528e5d777
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ddaf12390d3ffb7d5ba74491a48f3cd528e5d777" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/osobiehl/rust-for-cpp-devs 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" "+ddaf12390d3ffb7d5ba74491a48f3cd528e5d777" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: file `/workspace/builds/worker-3-tc1/source/03_borrow_checking/01_references.rs` found to be present in multiple build targets:
[INFO] [stderr]   * `bin` target `01_borrow_checking`
[INFO] [stderr]   * `bin` target `01_references`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds


no output for 300 seconds