SEVERE [org.netbeans.modules.java.source.usages.RepositoryUpdater]: Coupling error: class file jar:file:/space/jdk1.6.0_02/jre/lib/rt.jar!/java/awt/Window.class, source file jar:file:/space/jdk7/src.zip!/java/awt/Window.java
SEVERE [global]
java.lang.NullPointerException
	at com.sun.tools.javac.comp.Attr.visitVarDef(Attr.java:721)
	at com.sun.tools.javac.tree.JCTree$JCVariableDecl.accept(JCTree.java:714)
	at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:383)
	at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:420)
	at com.sun.tools.javac.comp.Attr.attribClassBody(Attr.java:2763)
	at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:2689)
	at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:2645)
	at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:2623)
	at com.sun.tools.javac.main.JavaCompiler.attribute(JavaCompiler.java:1060)
	at com.sun.tools.javac.api.JavacTaskImpl$2.process(JavacTaskImpl.java:446)
	at com.sun.tools.javac.api.JavacTaskImpl$Filter.run(JavacTaskImpl.java:587)
	at com.sun.tools.javac.api.JavacTaskImpl.analyze(JavacTaskImpl.java:449)
	at org.netbeans.modules.java.source.TreeLoader.loadTreeFor(TreeLoader.java:75)
	at com.sun.tools.javac.code.Symbol$ParamSymbol.getSimpleName(Symbol.java:1017)
	at com.sun.tools.javac.code.Symbol$ParamSymbol.getSimpleName(Symbol.java:1006)
	at org.netbeans.modules.editor.java.JavaCompletionItem$MethodItem.<init>(JavaCompletionItem.java:1073)
	at org.netbeans.modules.editor.java.JavaCompletionItem$MethodItem.<init>(JavaCompletionItem.java:1031)
	at org.netbeans.modules.editor.java.JavaCompletionItem.createExecutableItem(JavaCompletionItem.java:136)
	at org.netbeans.modules.editor.java.JavaCompletionProvider$JavaCompletionQuery.addMembers(JavaCompletionProvider.java:2437)
	at org.netbeans.modules.editor.java.JavaCompletionProvider$JavaCompletionQuery.insideMemberSelect(JavaCompletionProvider.java:1343)
	at org.netbeans.modules.editor.java.JavaCompletionProvider$JavaCompletionQuery.resolveCompletion(JavaCompletionProvider.java:537)
	at org.netbeans.modules.editor.java.JavaCompletionProvider$JavaCompletionQuery.run(JavaCompletionProvider.java:333)
	at org.netbeans.modules.editor.java.JavaCompletionProvider$JavaCompletionQuery.run(JavaCompletionProvider.java:100)
	at org.netbeans.api.java.source.JavaSource.runUserActionTask(JavaSource.java:563)
	at org.netbeans.api.java.source.JavaSource.runWhenScanFinished(JavaSource.java:708)
[catch] at org.netbeans.modules.editor.java.JavaCompletionProvider$JavaCompletionQuery.query(JavaCompletionProvider.java:243)
	at org.netbeans.spi.editor.completion.support.AsyncCompletionTask.run(AsyncCompletionTask.java:196)
	at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:539)
	at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:964)