errael opened a new issue, #9466:
URL: https://github.com/apache/netbeans/issues/9466
### 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 #202605191504~1779464622~22.04~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
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