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https://issues.apache.org/jira/browse/NETBEANS-2354?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16810043#comment-16810043
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Travis commented on NETBEANS-2354:
----------------------------------
I peeked at FolderTreeElement.java:119, which is:
System.arraycopy(xmlgroups,0,allgroups,allgroups.length-1,xmlgroups.length);
If I understand this code correctly, it is just trying to create an "allgroups"
array which contains everything from the "javagroups" array followed by
everything from the "xmlgroups" array. So I think the bug is the fourth
argument to arraycopy, which is the destPos. This is "allgroups.length-1" but
I think maybe it should be "javagroups.length".
> ArrayIndexOutOfBoundsException during "Find Usages" operation
> -------------------------------------------------------------
>
> Key: NETBEANS-2354
> URL: https://issues.apache.org/jira/browse/NETBEANS-2354
> Project: NetBeans
> Issue Type: Bug
> Components: java - Refactoring
> Affects Versions: 11.0
> Reporter: Travis
> Priority: Major
>
> I'm using Netbeans 11 vc4 on Java 8 multi-project (on Windows). I ran "Find
> Usages" on a method and got the exception below. After this exception, the
> find results were empty, despite there being callers of the method within the
> search scope.
>
> I have spent a ton of time working with the same project using Netbeans 10,
> and running "Find Usages" frequently. I never got this exception there
> before, and Find Usages has been totally robust until now. So it seems this
> is likely a new bug in Netbeans 11.
>
> I cannot provide the gigantic multi-project where this problem is
> reproducible. I could try to reduce it down to a minimal testcase and then
> obfuscate the code, if you need an example project to reproduce this issue or
> to test the fix.
>
> Thanks!
>
> java.lang.ArrayIndexOutOfBoundsException
> at java.lang.System.arraycopy(Native Method)
> at
> org.netbeans.modules.refactoring.java.ui.tree.FolderTreeElement.getSourceGroup(FolderTreeElement.java:119)
> at
> org.netbeans.modules.refactoring.java.ui.tree.TreeElementFactoryImpl.getTreeElement(TreeElementFactoryImpl.java:55)
> at
> org.netbeans.modules.refactoring.spi.ui.TreeElementFactory.getTreeElement(TreeElementFactory.java:44)
> at
> org.netbeans.modules.refactoring.java.ui.tree.FileTreeElement.getParent(FileTreeElement.java:75)
> at
> org.netbeans.modules.refactoring.spi.impl.RefactoringPanel.createNode(RefactoringPanel.java:488)
> at
> org.netbeans.modules.refactoring.spi.impl.RefactoringPanel.createNode(RefactoringPanel.java:493)
> at
> org.netbeans.modules.refactoring.spi.impl.RefactoringPanel.createNode(RefactoringPanel.java:493)
> at
> org.netbeans.modules.refactoring.spi.impl.RefactoringPanel.access$1100(RefactoringPanel.java:80)
> at
> org.netbeans.modules.refactoring.spi.impl.RefactoringPanel$3.run(RefactoringPanel.java:765)
> at org.openide.util.RequestProcessor$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)
> [catch] at
> org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)
>
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