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Comparison method violates its general contract!
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Comparison method violates its general contract!
java.lang.IllegalArgumentException: Comparison method violates its general contract!	at java.util.TimSort.mergeLo(TimSort.java:747)	at java.util.TimSort.mergeAt(TimSort.java:483)	at java.util.TimSort.mergeCollapse(TimSort.java:410)	at java.util.TimSort.sort(TimSort.java:214)	at java.util.TimSort.sort(TimSort.java:173)	at java.util.Arrays.sort(Arrays.java:659)	at org.eclipse.jface.viewers.ViewerComparator.sort(ViewerComparator.java:185)	at org.eclipse.jface.viewers.StructuredViewer.getSortedChildren(StructuredViewer.java:1071)	at org.eclipse.ui.internal.progress.DetailedProgressViewer.refreshAll(DetailedProgressViewer.java:486)	at org.eclipse.ui.internal.progress.DetailedProgressViewer.internalRefresh(DetailedProgressViewer.java:383)	at org.eclipse.jface.viewers.StructuredViewer.internalRefresh(StructuredViewer.java:1299)	at org.eclipse.jface.viewers.StructuredViewer$8.run(StructuredViewer.java:1535)	at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1443)	at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1404)	at org.eclipse.jface.viewers.StructuredViewer.refresh(StructuredViewer.java:1533)	at org.eclipse.jface.viewers.StructuredViewer.refresh(StructuredViewer.java:1490)	at org.eclipse.ui.internal.progress.ProgressViewerContentProvider.refresh(ProgressViewerContentProvider.java:140)	at org.eclipse.ui.internal.progress.ProgressViewerContentProvider$3.runInUIThread(ProgressViewerContentProvider.java:117)	at org.eclipse.ui.progress.UIJob$1.run(UIJob.java:95)	at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)	at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:135)