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Build: NetBeans IDE 7.2 Beta (Build 201205031832) VM: Java HotSpot(TM) 64-Bit Server VM, 22.1-b02, Java(TM) SE Runtime Environment, 1.7.0_03-b04 OS: Linux Stacktrace: java.lang.IllegalStateException: Attempt to mutate in notification at javax.swing.text.AbstractDocument.writeLock(AbstractDocument.java:1338) at javax.swing.text.AbstractDocument.remove(AbstractDocument.java:585) at javax.swing.text.DefaultEditorKit$DeletePrevCharAction.actionPerformed(DefaultEditorKit.java:1062) at javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1661) at javax.swing.JComponent.processKeyBinding(JComponent.java:2879) at javax.swing.JComponent.processKeyBindings(JComponent.java:2926)
Created attachment 119849 [details] stacktrace
It seems that tomcat DocumentListener tries to mutate the document. Reassigning or evaluation.
Reported for 7.3.x or earlier, no new info since then -> closing as worksforme, please reopen in case you see it.