This bug was originally marked as duplicate of bug 214686, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related.
Build: NetBeans IDE 7.3 Beta 2 (Build 201211062253)
VM: Java HotSpot(TM) Client VM, 23.3-b01, Java(TM) SE Runtime Environment, 1.7.0_07-b11
OS: Windows 7
Created attachment 130098 [details]
Created attachment 149758 [details]
Created attachment 149780 [details]
P2 because 15 + 7 (from bug #214686) reports
Very annoyed exception report makes impossible to edit file.
Getting this on an anonymous Java 8 class that extends an abstract class. If I save the class, Netbeans hangs and has to be restarted!
Created attachment 151079 [details]
editing a test file of a gradle project
*** Bug 249597 has been marked as a duplicate of this bug. ***
Already fixed in dev build.
*** This bug has been marked as a duplicate of bug 249472 ***