java.lang.IllegalStateException: Fold has been already finished.
   at org.netbeans.core.output2.NbIO$IOFoldingImpl$NbIoFoldHandleDefinition.finish(NbIO.java:623)
   at org.openide.windows.FoldHandle.finish(FoldHandle.java:75)
   at org.apache.tools.ant.module.bridge.impl.ForkedJavaOverride$FoldingHelper.clearHandle(ForkedJavaOverride.java:417)
   at org.apache.tools.ant.module.bridge.impl.ForkedJavaOverride$FoldingHelper.checkFolds(ForkedJavaOverride.java:410)
   at org.apache.tools.ant.module.bridge.impl.ForkedJavaOverride$FoldingHelper.access$600(ForkedJavaOverride.java:388)
   at org.apache.tools.ant.module.bridge.impl.ForkedJavaOverride$Copier.run(ForkedJavaOverride.java:326)
   at java.lang.Thread.run(Thread.java:745)