This Bugzilla instance is a read-only archive of historic NetBeans bug reports. To report a bug in NetBeans please follow the project's instructions for reporting issues.
Thrown for me repeatedly in a current build after making edits in a few files, not sure why. Most recent: http://statistics.netbeans.org/exceptions/detail.do?id=11237
This seems to happen occasionally. I don't know why or how to reproduce it. One theory is that the ordering of GapList's data gets broken for some reason and subsequent operations involving binary search for an element fail. It could have something to do with editor undo/redo and recalculating positions. I'll try to write some tests for it and see if they crash too. *** This issue has been marked as a duplicate of 117403 ***