Exception thrown while refactoring classes and methods

Occasionally, following exception is thrown while renaming a class or method.

INFO [null]: Last record repeated again.
SEVERE [org.openide.util.Exceptions]
java.lang.NoSuchFieldError: pat
at org.netbeans.modules.java.source.save.CasualDiff.matchCase(CasualDiff.java:5755)
at org.netbeans.modules.java.source.save.CasualDiff.treesMatch(CasualDiff.java:3125)
at org.netbeans.modules.java.source.save.CasualDiff.treesMatch(CasualDiff.java:3083)
at org.netbeans.modules.java.source.save.CasualDiff.listsMatch(CasualDiff.java:5715)
at org.netbeans.modules.java.source.save.CasualDiff.matchSwitch(CasualDiff.java:5751)
at org.netbeans.modules.java.source.save.CasualDiff.treesMatch(CasualDiff.java:3123)
at org.netbeans.modules.java.source.save.CasualDiff.treesMatch(CasualDiff.java:3083)
at org.netbeans.modules.java.source.save.CasualDiff.listsMatch(CasualDiff.java:5715)
at org.netbeans.modules.java.source.save.CasualDiff.matchBlock(CasualDiff.java:5725)
at org.netbeans.modules.java.source.save.CasualDiff.treesMatch(CasualDiff.java:3111)
at org.netbeans.modules.java.source.save.CasualDiff.treesMatch(CasualDiff.java:3083)
at org.netbeans.modules.java.source.save.CasualDiff.matchLambda(CasualDiff.java:5889)
at org.netbeans.modules.java.source.save.CasualDiff.treesMatch(CasualDiff.java:3237)
at org.netbeans.modules.java.source.save.CasualDiff.treesMatch(CasualDiff.java:3083)
at org.netbeans.modules.java.source.save.CasualDiff.listsMatch(CasualDiff.java:5715)
at org.netbeans.modules.java.source.save.CasualDiff.matchApply(CasualDiff.java:5798)
at org.netbeans.modules.java.source.save.CasualDiff.treesMatch(CasualDiff.java:3149)
at org.netbeans.modules.java.source.save.CasualDiff.treesMatch(CasualDiff.java:3083)
at org.netbeans.modules.java.source.save.CasualDiff.treesMatch(CasualDiff.java:3137)
at org.netbeans.modules.java.source.save.CasualDiff.treesMatch(CasualDiff.java:3083)
at org.netbeans.modules.java.source.save.CasualDiff.listsMatch(CasualDiff.java:5715)
at org.netbeans.modules.java.source.save.CasualDiff.matchBlock(CasualDiff.java:5725)
at org.netbeans.modules.java.source.save.CasualDiff.treesMatch(CasualDiff.java:3111)
at org.netbeans.modules.java.source.save.CasualDiff.treesMatch(CasualDiff.java:3083)
at org.netbeans.modules.java.source.save.CasualDiff.matchLambda(CasualDiff.java:5889)
at org.netbeans.modules.java.source.save.CasualDiff.treesMatch(CasualDiff.java:3237)
at org.netbeans.modules.java.source.save.CasualDiff.treesMatch(CasualDiff.java:3083)
at org.netbeans.modules.java.source.save.CasualDiff.listsMatch(CasualDiff.java:5715)
at org.netbeans.modules.java.source.save.CasualDiff.diffApply(CasualDiff.java:2285)
at org.netbeans.modules.java.source.save.CasualDiff.diffTreeImpl0(CasualDiff.java:5508)
at org.netbeans.modules.java.source.save.CasualDiff.diffTreeImpl(CasualDiff.java:5332)
at org.netbeans.modules.java.source.save.CasualDiff.diffTree(CasualDiff.java:5259)
at org.netbeans.modules.java.source.save.CasualDiff.diffTree(CasualDiff.java:5230)
at org.netbeans.modules.java.source.save.CasualDiff.diffExec(CasualDiff.java:2186)
at org.netbeans.modules.java.source.save.CasualDiff.diffTreeImpl0(CasualDiff.java:5490)
at org.netbeans.modules.java.source.save.CasualDiff.diffTreeImpl(CasualDiff.java:5332)
at org.netbeans.modules.java.source.save.CasualDiff.diffTree(CasualDiff.java:5259)
at org.netbeans.modules.java.source.save.CasualDiff.diffTree(CasualDiff.java:5230)
at org.netbeans.modules.java.source.save.CasualDiff.diffList(CasualDiff.java:4066)
at org.netbeans.modules.java.source.save.CasualDiff.diffBlock(CasualDiff.java:1644)
at org.netbeans.modules.java.source.save.CasualDiff.diffTreeImpl0(CasualDiff.java:5451)
at org.netbeans.modules.java.source.save.CasualDiff.diffTreeImpl(CasualDiff.java:5332)
at org.netbeans.modules.java.source.save.CasualDiff.diffTree(CasualDiff.java:5259)
at org.netbeans.modules.java.source.save.CasualDiff.diffTree(CasualDiff.java:5242)
at org.netbeans.modules.java.source.save.CasualDiff.diff(CasualDiff.java:347)
at org.netbeans.api.java.source.WorkingCopy.processCurrentCompilationUnit(WorkingCopy.java:920)
at org.netbeans.api.java.source.WorkingCopy.getChanges(WorkingCopy.java:1332)
at org.netbeans.api.java.source.JavaSource$1.run(JavaSource.java:676)
at org.netbeans.api.java.source.JavaSource$1.run(JavaSource.java:663)
at org.netbeans.api.java.source.JavaSource$MultiTask.run(JavaSource.java:502)
at org.netbeans.modules.parsing.impl.TaskProcessor.callUserTask(TaskProcessor.java:586)
at org.netbeans.modules.parsing.api.ParserManager$MultiUserTaskAction.run(ParserManager.java:166)
at org.netbeans.modules.parsing.api.ParserManager$MultiUserTaskAction.run(ParserManager.java:138)
at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:181)
at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:178)
at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:153)
at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:335)
at org.netbeans.modules.parsing.nb.DataObjectEnvFactory.runPriorityIO(DataObjectEnvFactory.java:118)
at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:67)
at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:178)
at org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:83)
at org.netbeans.api.java.source.JavaSource.runUserActionTaskImpl(JavaSource.java:452)
at org.netbeans.api.java.source.JavaSource.runUserActionTask(JavaSource.java:423)
at org.netbeans.api.java.source.JavaSource.runModificationTask(JavaSource.java:684)
at org.netbeans.modules.refactoring.java.spi.JavaRefactoringPlugin.processFiles(JavaRefactoringPlugin.java:320)
at org.netbeans.modules.refactoring.java.spi.JavaRefactoringPlugin.processFiles(JavaRefactoringPlugin.java:263)
at org.netbeans.modules.refactoring.java.spi.JavaRefactoringPlugin.processFiles(JavaRefactoringPlugin.java:245)
at org.netbeans.modules.refactoring.java.spi.JavaRefactoringPlugin.createAndAddElements(JavaRefactoringPlugin.java:335)
at org.netbeans.modules.refactoring.java.plugins.RenameRefactoringPlugin.prepare(RenameRefactoringPlugin.java:626)
[catch] at org.netbeans.modules.refactoring.api.AbstractRefactoring.pluginsPrepare2(AbstractRefactoring.java:417)
at org.netbeans.modules.refactoring.api.AbstractRefactoring.pluginsPrepare(AbstractRefactoring.java:401)
at org.netbeans.modules.refactoring.api.AbstractRefactoring.prepare(AbstractRefactoring.java:212)
at org.netbeans.modules.refactoring.spi.impl.ParametersPanel$Prepare.run(ParametersPanel.java:1063)
at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1418)
at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:45)
at org.openide.util.lookup.Lookups.executeWith(Lookups.java:278)
at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)