[INFO] fetching crate tockloader-proto 0.2.1...
[INFO] checking tockloader-proto-0.2.1 against master#7c4ac0603e9ee5295bc802c90575391288a69a8a for pr-124728
[INFO] extracting crate tockloader-proto 0.2.1 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate tockloader-proto 0.2.1 on toolchain 7c4ac0603e9ee5295bc802c90575391288a69a8a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7c4ac0603e9ee5295bc802c90575391288a69a8a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tockloader-proto 0.2.1
[INFO] finished tweaking crates.io crate tockloader-proto 0.2.1
[INFO] tweaked toml for crates.io crate tockloader-proto 0.2.1 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7c4ac0603e9ee5295bc802c90575391288a69a8a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.