This bug was originally marked as duplicate of bug 170487, 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 091201-a62c1eb4c864)
VM: OpenJDK 64-Bit Server VM, 14.0-b08, OpenJDK Runtime Environment, 1.6.0_0-b14
OS: Linux, 2.6.28-16-generic, amd64

User Comments:
ivansidorkin: Create Java Application
in Main.java add new line to body of main method
type 'sout' and press tab so it will be expanded to System.out.println("");
move cursor to the EOL
start to delete line using BackSpace button



Stacktrace: 
java.lang.NullPointerException
        at org.netbeans.modules.editor.hints.AnnotationHolder.removeUpdate(AnnotationHolder.java:410)
        at org.netbeans.lib.editor.util.swing.PriorityDocumentListenerList.removeUpdate(PriorityDocumentListenerList.java:99)
        at javax.swing.text.AbstractDocument.fireRemoveUpdate(AbstractDocument.java:260)
        at org.netbeans.editor.BaseDocument.fireRemoveUpdate(BaseDocument.java:1626)
        at org.netbeans.editor.BaseDocument.remove(BaseDocument.java:925)
        at org.netbeans.editor.BaseKit$DeleteCharAction$1.run(BaseKit.java:1535)