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This bug was originally marked as duplicate of bug 177160, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related. Build: NetBeans IDE Dev (Build 200912010200) VM: Java HotSpot(TM) Client VM, 14.0-b16, Java(TM) SE Runtime Environment, 1.6.0_14-b08 OS: Windows XP, 5.1, x86 User Comments: dheffelfinger: hitting backspace triggers the exception Stacktrace: java.lang.NullPointerException at org.netbeans.modules.editor.hints.AnnotationHolder.insertUpdate(AnnotationHolder.java:310) at org.netbeans.lib.editor.util.swing.PriorityDocumentListenerList.insertUpdate(PriorityDocumentListenerList.java:79) at javax.swing.text.AbstractDocument.fireInsertUpdate(AbstractDocument.java:185) at org.netbeans.editor.BaseDocument.fireInsertUpdate(BaseDocument.java:1623) at org.netbeans.editor.BaseDocumentEvent.undo(BaseDocumentEvent.java:310) at org.netbeans.editor.GuardedDocumentEvent.undo(GuardedDocumentEvent.java:69)
Created attachment 91946 [details] stacktrace
Created attachment 91947 [details] stacktrace
*** This bug has been marked as a duplicate of bug 177914 ***