Refactor rename: AssertionError: Diff not implemented: SNIPPET

[errael]

Apache NetBeans version

Apache NetBeans 30

What happened

With

interface RefactorSnippet {
    /**
     * {@snippet :
     * update();
     * }
     */
    default void update() {
    }
}

1. Place cursor on update on line default void update() {
2. Do refactor rename
3. check box Apply rename on comments
4. Click refactor

Observe AssertionError

Language / Project Type / NetBeans Component

java refactor

How to reproduce

See OP

Did this work correctly in an earlier version?

No / Don't know

Operating System

Linux harmony 7.0.9-76070009-generic #202605191504177946462222.04~ef31795 SMP PREEMPT_DYNAMIC Fri M x86_64 x86_64 x86_64 GNU/Linux

JDK

openjdk 26 2026-03-17 OpenJDK Runtime Environment (build 26+35-2893) OpenJDK 64-Bit Server VM (build 26+35-2893, mixed mode, sharing)

Apache NetBeans packaging

Apache NetBeans binary zip

Anything else

INFO [org.netbeans.modules.refactoring.spi.impl.ParametersPanel]: org.netbeans.modules.refactoring.api.AbstractRefactoring$ProgressL@5b1ea785 called start multiple times
INFO [org.netbeans.modules.refactoring.spi.impl.ParametersPanel]: org.netbeans.modules.refactoring.api.AbstractRefactoring$ProgressL@5b1ea785 called start multiple times
SEVERE [org.openide.util.Exceptions]
java.lang.AssertionError: Diff not implemented: SNIPPET com.sun.tools.javac.tree.DCTree$DCSnippet
	at org.netbeans.modules.java.source.save.CasualDiff.diffDocTree(CasualDiff.java:4891)
	at org.netbeans.modules.java.source.save.CasualDiff.diffList(CasualDiff.java:5310)
	at org.netbeans.modules.java.source.save.CasualDiff.diffDocComment(CasualDiff.java:4924)
	at org.netbeans.modules.java.source.save.CasualDiff.diffDocTree(CasualDiff.java:4779)
	at org.netbeans.modules.java.source.save.CasualDiff.diffCommentLists(CasualDiff.java:4674)
	at org.netbeans.modules.java.source.save.CasualDiff.diffPrecedingComments(CasualDiff.java:4565)
	at org.netbeans.modules.java.source.save.CasualDiff.diffTreeImpl0(CasualDiff.java:5664)
	at org.netbeans.modules.java.source.save.CasualDiff.diffTreeImpl(CasualDiff.java:5603)
	at org.netbeans.modules.java.source.save.CasualDiff.diffTree(CasualDiff.java:5530)
	at org.netbeans.modules.java.source.save.CasualDiff.diffTree(CasualDiff.java:5501)
	at org.netbeans.modules.java.source.save.CasualDiff.diffList(CasualDiff.java:4314)
	at org.netbeans.modules.java.source.save.CasualDiff.diffClassDef(CasualDiff.java:1204)
	at org.netbeans.modules.java.source.save.CasualDiff.diffTreeImpl0(CasualDiff.java:5714)
	at org.netbeans.modules.java.source.save.CasualDiff.diffTreeImpl(CasualDiff.java:5603)
	at org.netbeans.modules.java.source.save.CasualDiff.diffTree(CasualDiff.java:5530)
	at org.netbeans.modules.java.source.save.CasualDiff.diffTree(CasualDiff.java:5501)
	at org.netbeans.modules.java.source.save.CasualDiff.diffList(CasualDiff.java:4314)
	at org.netbeans.modules.java.source.save.CasualDiff.diffTopLevel(CasualDiff.java:602)
	at org.netbeans.modules.java.source.save.CasualDiff.diffTreeImpl0(CasualDiff.java:5684)
	at org.netbeans.modules.java.source.save.CasualDiff.diffTreeImpl(CasualDiff.java:5603)
	at org.netbeans.modules.java.source.save.CasualDiff.diffTree(CasualDiff.java:5530)
	at org.netbeans.modules.java.source.save.CasualDiff.diffTree(CasualDiff.java:5513)
	at org.netbeans.modules.java.source.save.CasualDiff.diff(CasualDiff.java:358)
	at org.netbeans.api.java.source.WorkingCopy.processCurrentCompilationUnit(WorkingCopy.java:905)
	at org.netbeans.api.java.source.WorkingCopy.getChanges(WorkingCopy.java:1320)
	at org.netbeans.api.java.source.JavaSource$1.run(JavaSource.java:672)
	at org.netbeans.api.java.source.JavaSource$1.run(JavaSource.java:661)
	at org.netbeans.api.java.source.JavaSource$MultiTask.run(JavaSource.java:504)
	at org.netbeans.modules.parsing.impl.TaskProcessor.callUserTask(TaskProcessor.java:586)
	at org.netbeans.modules.parsing.api.ParserManager$MultiUserTaskAction.run(ParserManager.java:235)
	at org.netbeans.modules.parsing.api.ParserManager$MultiUserTaskAction.run(ParserManager.java:205)
	at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:181)
	at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:178)
	at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:153)
	at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:341)
	at org.netbeans.modules.parsing.nb.DataObjectEnvFactory.runPriorityIO(DataObjectEnvFactory.java:118)
	at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:67)
	at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:178)
	at org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:85)
	at org.netbeans.api.java.source.JavaSource.runUserActionTaskImpl(JavaSource.java:454)
	at org.netbeans.api.java.source.JavaSource.runUserActionTask(JavaSource.java:425)
	at org.netbeans.api.java.source.JavaSource.runModificationTask(JavaSource.java:680)
	at org.netbeans.modules.refactoring.java.spi.JavaRefactoringPlugin.processFiles(JavaRefactoringPlugin.java:325)
	at org.netbeans.modules.refactoring.java.spi.JavaRefactoringPlugin.processFiles(JavaRefactoringPlugin.java:264)
	at org.netbeans.modules.refactoring.java.spi.JavaRefactoringPlugin.processFiles(JavaRefactoringPlugin.java:246)
	at org.netbeans.modules.refactoring.java.spi.JavaRefactoringPlugin.createAndAddElements(JavaRefactoringPlugin.java:340)
	at org.netbeans.modules.refactoring.java.spi.JavaRefactoringPlugin.createAndAddElements(JavaRefactoringPlugin.java:356)
	at org.netbeans.modules.refactoring.java.plugins.RenameRefactoringPlugin.prepare(RenameRefactoringPlugin.java:613)
[catch] at org.netbeans.modules.refactoring.api.AbstractRefactoring.pluginsPrepare2(AbstractRefactoring.java:417)
	at org.netbeans.modules.refactoring.api.AbstractRefactoring.pluginsPrepare(AbstractRefactoring.java:401)
	at org.netbeans.modules.refactoring.api.AbstractRefactoring.prepare(AbstractRefactoring.java:212)
	at org.netbeans.modules.refactoring.spi.impl.ParametersPanel$Prepare.run(ParametersPanel.java:1063)
	at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1370)
	at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:45)
	at org.openide.util.lookup.Lookups.executeWith(Lookups.java:287)
	at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1981)

Are you willing to submit a pull request?

No

[errael]

@jlahoda FYI