matthiasblaesing opened a new issue, #8123:
URL: https://github.com/apache/netbeans/issues/8123
### Apache NetBeans version
Apache NetBeans latest daily build
### What happened
While testing master (6c17cc6c78f07c04460ad42ea2e7876510329c31) I noticed
this exception:
```
[exec] java.lang.ClassCastException: class
org.netbeans.modules.csl.editor.semantic.SequenceElement cannot be cast to
class java.lang.Comparable
(org.netbeans.modules.csl.editor.semantic.SequenceElement is in unnamed module
of loader org.netbeans.StandardModule$OneModuleClassLoader @bad9ea;
java.lang.Comparable is in module java.base of loader 'bootstrap')
[exec] at java.base/java.util.TreeMap.compare(TreeMap.java:1604)
[exec] at
java.base/java.util.TreeMap.addEntryToEmptyMap(TreeMap.java:811)
[exec] at java.base/java.util.TreeMap.put(TreeMap.java:820)
[exec] at java.base/java.util.TreeMap.put(TreeMap.java:569)
[exec] at java.base/java.util.TreeSet.add(TreeSet.java:259)
[exec] at
org.netbeans.modules.csl.editor.semantic.MarkOccurrencesHighlighter.run(MarkOccurrencesHighlighter.java:123)
[exec] at
org.netbeans.modules.csl.editor.semantic.MarkOccurrencesHighlighter.run(MarkOccurrencesHighlighter.java:58)
[exec] at
org.netbeans.modules.parsing.impl.TaskProcessor.callParserResultTask(TaskProcessor.java:561)
[exec] [catch] at
org.netbeans.modules.parsing.impl.TaskProcessor$RequestPerformer.run(TaskProcessor.java:786)
[exec] at
org.openide.util.lookup.Lookups.executeWith(Lookups.java:288)
[exec] at
org.netbeans.modules.parsing.impl.TaskProcessor$RequestPerformer.execute(TaskProcessor.java:702)
[exec] at
org.netbeans.modules.parsing.impl.TaskProcessor$CompilationJob.run(TaskProcessor.java:663)
[exec] at
java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:572)
[exec] at
java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317)
[exec] at
org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1403)
[exec] at
org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:45)
[exec] at
org.openide.util.lookup.Lookups.executeWith(Lookups.java:287)
[exec] at
org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2018)
```
This points directly to: PR #8028, which made `SequenceElement` non
comparable, yet stuffs these type into a `TreeSet`.
### Language / Project Type / NetBeans Component
CSL API
### How to reproduce
- Start a recent master build
- Create a JS file with this content:
```
var a = 1;
var b = a;
```
- Place cursor on variable `a`
You should see a highlight of both occurrences of the variable, but you get
an exception.
### Did this work correctly in an earlier version?
Apache NetBeans 24
### Operating System
Ubuntu 24.10
### JDK
Ubuntu JDK 21
### Apache NetBeans packaging
Other
### Anything else
_No response_
### Are you willing to submit a pull request?
No
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