[INFO] fetching crate xgboost 0.1.4...
[INFO] testing xgboost-0.1.4 against master#ec6f9a5b4413f74386267ef8efc93712c2ce6db6 for pr-155739
[INFO] extracting crate xgboost 0.1.4 into /workspace/builds/worker-6-tc1/source


overridden task result to prepare-fail:unknown

Caused by:
    0: uncategorized prepare error
    1: unable to download xgboost version 0.1.4
    2: failed to unpack `xgboost-0.1.4/.travis.yml` into `/workspace/builds/worker-6-tc1/source/.travis.yml`
    3: No space left on device (os error 28)