[INFO] fetching crate tip 0.3.1...
[INFO] checking tip-0.3.1 against master#01706e1a34c87656fcbfce198608f4cd2ac6461a for pr-135272
[INFO] extracting crate tip 0.3.1 into /workspace/builds/worker-2-tc1/source


unable to download tip version 0.3.1

Caused by:
    unexpected end of file