java.lang.IllegalArgumentException: Copying to 2018 is greater then its size (2015).
   at org.netbeans.modules.java.source.save.CasualDiff.copyTo(CasualDiff.java:5765)
   at org.netbeans.modules.java.source.save.CasualDiff.copyTo(CasualDiff.java:5744)
   at org.netbeans.modules.java.source.save.CasualDiff.diffReturn(CasualDiff.java:2052)
   at org.netbeans.modules.java.source.save.CasualDiff.diffTreeImpl0(CasualDiff.java:5279)
   at org.netbeans.modules.java.source.save.CasualDiff.diffTreeImpl(CasualDiff.java:5112)
   at org.netbeans.modules.java.source.save.CasualDiff.diffTree(CasualDiff.java:5040)
   at org.netbeans.modules.java.source.save.CasualDiff.diffTree(CasualDiff.java:5011)
   at org.netbeans.modules.java.source.save.CasualDiff.diffList(CasualDiff.java:3921)
   at org.netbeans.modules.java.source.save.CasualDiff.diffBlock(CasualDiff.java:1587)
   at org.netbeans.modules.java.source.save.CasualDiff.diffTreeImpl0(CasualDiff.java:5231)
   at org.netbeans.modules.java.source.save.CasualDiff.diffTreeImpl(CasualDiff.java:5112)
   at org.netbeans.modules.java.source.save.CasualDiff.diffTree(CasualDiff.java:5040)
   at org.netbeans.modules.java.source.save.CasualDiff.diffTree(CasualDiff.java:5011)
   at org.netbeans.modules.java.source.save.CasualDiff.diffMethodDef(CasualDiff.java:1369)
   at org.netbeans.modules.java.source.save.CasualDiff.diffTreeImpl0(CasualDiff.java:5221)
   at org.netbeans.modules.java.source.save.CasualDiff.diffTreeImpl(CasualDiff.java:5112)
   at org.netbeans.modules.java.source.save.CasualDiff.diffTree(CasualDiff.java:5040)
   at org.netbeans.modules.java.source.save.CasualDiff.diffTree(CasualDiff.java:5023)
   at org.netbeans.modules.java.source.save.CasualDiff.diff(CasualDiff.java:371)
   at org.netbeans.api.java.source.WorkingCopy.processCurrentCompilationUnit(WorkingCopy.java:929)
   at org.netbeans.api.java.source.WorkingCopy.getChanges(WorkingCopy.java:1341)
   at org.netbeans.api.java.source.JavaSource$1.run(JavaSource.java:697)
   at org.netbeans.api.java.source.JavaSource$1.run(JavaSource.java:684)
   at org.netbeans.api.java.source.JavaSource$MultiTask.run(JavaSource.java:523)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callUserTask(TaskProcessor.java:609)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:153)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:137)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:204)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:201)
   at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:176)
   at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:360)
   at org.netbeans.modules.parsing.nb.DataObjectEnvFactory.runPriorityIO(DataObjectEnvFactory.java:141)
   at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:90)
   at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:201)
   at org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:104)
   at org.netbeans.api.java.source.JavaSource.runUserActionTaskImpl(JavaSource.java:473)
   at org.netbeans.api.java.source.JavaSource.runUserActionTask(JavaSource.java:444)
   at org.netbeans.api.java.source.JavaSource.runModificationTask(JavaSource.java:705)
   at org.netbeans.modules.java.hints.spiimpl.JavaFixImpl.implement(JavaFixImpl.java:97)
   at org.netbeans.modules.editor.hints.HintsUI$1.run(HintsUI.java:835)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1443)
   at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:68)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:303)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2058)