java.lang.AssertionError: Adding not finished
	at org.netbeans.modules.editor.completion.CompletionResultSetImpl.getItems(CompletionResultSetImpl.java:163)
	at org.netbeans.modules.editor.completion.CompletionImpl.requestShowCompletionPane(CompletionImpl.java:478)
	at org.netbeans.modules.editor.completion.CompletionImpl.finishNotify(CompletionImpl.java:696)
	at org.netbeans.modules.editor.completion.CompletionResultSetImpl.finish(CompletionResultSetImpl.java:199)
	at org.netbeans.spi.editor.completion.CompletionResultSet.finish(CompletionResultSet.java:184)
	at org.netbeans.modules.editor.java.AbbreviationsCompletionProvider$Query.query(AbbreviationsCompletionProvider.java:80)
	at org.netbeans.spi.editor.completion.support.AsyncCompletionTask.run(AsyncCompletionTask.java:181)
	at org.openide.util.Task.run(Task.java:207)
	at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:469)
[catch] at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:870)