Created attachment 125467 [details]
Dump file (includes stack trace)

Every time I try to add an event listener to a component in the GUI Builder, I get the following error (abridged - full trace attached):

An error occurred during parsing of '...'. Please report a bug against java/source and attach dump file '...'.
Caused: java.lang.AssertionError: Attr.visitNewClass tree [new java.awt.event.ActionListener(){
    
    () {
        super();
    }
    
    public void actionPerformed(java.awt.event.ActionEvent evt) {
        colorTableChanged(evt);
    }
}] with constructor type [null] has symbol [symbol not found error] of kind [ 71]
	at com.sun.tools.javac.util.Assert.error(Assert.java:133)
	at com.sun.tools.javac.comp.Attr.visitNewClass(Attr.java:1873)
	at com.sun.tools.javac.tree.JCTree$JCNewClass.accept(JCTree.java:1377)
	at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:451)
	at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:424)
	at com.sun.tools.javac.comp.Attr.attribArgs(Attr.java:525)
	at com.sun.tools.javac.comp.Attr.visitApply(Attr.java:1549)
	at com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1326)
...

Exception Reporter linked it to issue #138391, although the stack traces are subtly different and AFAICT all the reports there relate to manual editing.

Using NetBeans 7.2 / GUIBuilder 1.16.1 / Java 1.6.0_33; Java HotSpot(TM) 64-Bit Server VM 20.8-b03-424