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This bug was originally marked as duplicate of bug 250462, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related. Build: NetBeans IDE Dev (Build 201710230002) VM: Java HotSpot(TM) 64-Bit Server VM, 9.0.1+11, Java(TM) SE Runtime Environment, 9.0.1+11 OS: Mac OS X User Comments: akrasny: Class rename Stacktrace: java.lang.NullPointerException at org.netbeans.modules.refactoring.java.plugins.RenameRefactoringPlugin.fastCheckParameters(RenameRefactoringPlugin.java:318) at org.netbeans.modules.refactoring.java.spi.JavaRefactoringPlugin$WorkingTask.run(JavaRefactoringPlugin.java:424) at org.netbeans.modules.refactoring.java.spi.JavaRefactoringPlugin$WorkingTask.run(JavaRefactoringPlugin.java:394) 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)
Created attachment 165456 [details] stacktrace