[INFO] fetching crate blacken 0.0.1...
[INFO] checking blacken-0.0.1 against master#f2d69d5a7c04617d122facd0a7a5bdde0af928ae for pr-138363
[INFO] extracting crate blacken 0.0.1 into /workspace/builds/worker-3-tc1/source


unable to download blacken version 0.0.1

Caused by:
    unexpected end of file