[INFO] fetching crate backtracer_core 0.0.7...
[INFO] checking backtracer_core-0.0.7 against master#8f08b3a32478b8d0507732800ecb548a76e0fd0c for pr-144157
[INFO] extracting crate backtracer_core 0.0.7 into /workspace/builds/worker-5-tc1/source
[INFO] started tweaking crates.io crate backtracer_core 0.0.7
[INFO] finished tweaking crates.io crate backtracer_core 0.0.7
[INFO] tweaked toml for crates.io crate backtracer_core 0.0.7 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate backtracer_core 0.0.7 on toolchain 8f08b3a32478b8d0507732800ecb548a76e0fd0c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8f08b3a32478b8d0507732800ecb548a76e0fd0c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8f08b3a32478b8d0507732800ecb548a76e0fd0c" "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


no output for 300 seconds