Travis CI testing alway return error

[letrongbang]

This today, i have commit and pull request. But it alway failed.

Some error return, and I known it not related with my code.

after, i try remove all code i was added, now code is clearn like when i Fork it.

Unexpectedly, it also error.

i think some one atractor error is cause for me.

[phihag]

It doesn't always fail. If you look at the logs, some random extractor fails, but sometimes it works. Therefore, we cannot use the red/green status of travis, but have to look at the logs.