Steps to Reproduce

I have thus far been unable to reproduce the error locally, however I do occasionally see reports from users. The problem seems to come from an error during the permissions check. Based on the stack trace I have located the bug in ImagePickerCache::saveResult (ImagePickerCache.java). After creating the set it does an addAll of paths. However paths is nullable but addAll does not handle null parameters. Null is passed in via ImagePickerDelegate::finishWithError which happens in a few spots

Expected results:

No NPE

Actual results:

An NPE during various errors in the ImagePickerDelegate.