[INFO] fetching crate quickcheck-arbitrary-derive 0.2.7...
[INFO] testing quickcheck-arbitrary-derive-0.2.7 against master#562dee4820c458d823175268e41601d4c060588a for pr-154210
[INFO] extracting crate quickcheck-arbitrary-derive 0.2.7 into /workspace/builds/worker-7-tc1/source


overridden task result to prepare-fail:unknown

Caused by:
    0: uncategorized prepare error
    1: unable to download quickcheck-arbitrary-derive version 0.2.7
    2: unexpected end of file