[INFO] fetching crate mem 0.5.0...
[INFO] testing mem-0.5.0 against master#f9988fefd3add01f414f52b414308e7872622fee for pr-155114
[INFO] extracting crate mem 0.5.0 into /workspace/builds/worker-2-tc1/source


overridden task result to prepare-fail:unknown

Caused by:
    0: uncategorized prepare error
    1: unable to download mem version 0.5.0
    2: unexpected end of file