Uploading a patch after exceeding the max file revisions limit doesn't seem to respond on the UI

Because of this problem in https://jira.atlassian.com/browse/CRUC-6634, the first attempt to upload a patch bigger than 800 files is not a problem because the bug doesn't constraint on a new revision, however upon adding another patch subsequently should fail. However, the UI shows that it hangs with a spinning wheel - while the debug logging shows this trace

2016-06-09 09:55:49,296 ERROR [qtp597307515-245 ] fisheye AddPatchAction$1-doInTransaction - Error adding patch
com.atlassian.crucible.spi.services.ReviewContentTooLargeException: Attempt to add too many revisions to a review - no more than 800 file revisions are allowed.
	at com.cenqua.crucible.model.Review.checkRoomForMoreContentExists(Review.java:1372) [fisheye.jar:?]

Eitherway, the second patch will not get uploaded even after reloading the page