In V8CustomVoidCallback if the callback throws an exception, that exception is not reported to WebCore.
Created attachment 38741 [details] Proposed patch
Comment on attachment 38741 [details] Proposed patch r-me.
Comment on attachment 38741 [details] Proposed patch Clearing flags on attachment: 38741 Committed r47871: <http://trac.webkit.org/changeset/47871>
All reviewed patches have been landed. Closing bug.