[INFO] fetching crate blacken 0.0.1...
[INFO] checking blacken-0.0.1 against master#18a029cfe8e761533634bda8fe8a14e30280a21b for pr-139646
[INFO] extracting crate blacken 0.0.1 into /workspace/builds/worker-0-tc1/source


unable to download blacken version 0.0.1

Caused by:
    unexpected end of file