[INFO] fetching crate tcp_message_io 1.0.4...
[INFO] testing tcp_message_io-1.0.4 against master#9e297bf54d31eb3b30067208ff9af4416945a2ed for pr-125507
[INFO] extracting crate tcp_message_io 1.0.4 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate tcp_message_io 1.0.4 on toolchain 9e297bf54d31eb3b30067208ff9af4416945a2ed
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9e297bf54d31eb3b30067208ff9af4416945a2ed" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tcp_message_io 1.0.4
[INFO] finished tweaking crates.io crate tcp_message_io 1.0.4
[INFO] tweaked toml for crates.io crate tcp_message_io 1.0.4 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9e297bf54d31eb3b30067208ff9af4416945a2ed" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[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.