junichi11 opened a new issue #3593:
URL: https://github.com/apache/netbeans/issues/3593
### Apache NetBeans version
Latest release candidate
### What happened
java.lang.NullPointerException occurs when we open a css file.
```
java.lang.NullPointerException
at
org.netbeans.modules.csl.navigation.ElementNode.getNodeForOffset(ElementNode.java:245)
at
org.netbeans.modules.csl.navigation.ElementNode.getMimeRootNodeForOffset(ElementNode.java:230)
at
org.netbeans.modules.csl.navigation.ElementNode.getMimeRootNodeForOffset(ElementNode.java:202)
at
org.netbeans.modules.csl.navigation.ClassMemberPanelUI.doSelectNodes0(ClassMemberPanelUI.java:263)
at
org.netbeans.modules.csl.navigation.ClassMemberPanelUI.access$500(ClassMemberPanelUI.java:74)
at
org.netbeans.modules.csl.navigation.ClassMemberPanelUI$3.run(ClassMemberPanelUI.java:254)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at
java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
at
org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:136)
[catch] at
java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
at
java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at
java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:109)
at java.awt.WaitDispatchSupport$2.run(WaitDispatchSupport.java:190)
at java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:235)
at java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:233)
at java.security.AccessController.doPrivileged(Native Method)
at java.awt.WaitDispatchSupport.enter(WaitDispatchSupport.java:233)
at java.awt.Dialog.show(Dialog.java:1084)
at
org.netbeans.core.windows.services.NbPresenter.superShow(NbPresenter.java:1074)
at
org.netbeans.core.windows.services.NbPresenter.doShow(NbPresenter.java:1124)
at
org.netbeans.core.windows.services.NbPresenter.run(NbPresenter.java:1096)
at
org.netbeans.core.windows.services.NbPresenter.run(NbPresenter.java:106)
at
org.netbeans.modules.openide.util.NbMutexEventProvider$Event.doEventAccess(NbMutexEventProvider.java:123)
at
org.netbeans.modules.openide.util.NbMutexEventProvider$Event.readAccess(NbMutexEventProvider.java:77)
at
org.netbeans.modules.openide.util.LazyMutexImplementation.readAccess(LazyMutexImplementation.java:71)
at org.openide.util.Mutex.readAccess(Mutex.java:199)
at
org.netbeans.core.windows.services.NbPresenter.show(NbPresenter.java:1081)
at java.awt.Component.show(Component.java:1671)
at java.awt.Component.setVisible(Component.java:1623)
at java.awt.Window.setVisible(Window.java:1014)
at java.awt.Dialog.setVisible(Dialog.java:1005)
at
org.netbeans.core.windows.services.DialogDisplayerImpl$1AWTQuery.showDialog(DialogDisplayerImpl.java:244)
at
org.netbeans.core.windows.services.DialogDisplayerImpl.notify(DialogDisplayerImpl.java:260)
at
org.netbeans.core.windows.services.DialogDisplayerImpl.notify(DialogDisplayerImpl.java:148)
at
org.netbeans.modules.project.ui.problems.BrokenReferencesImpl$1.run(BrokenReferencesImpl.java:107)
at
org.netbeans.core.windows.WindowManagerImpl$Exclusive$1.run(WindowManagerImpl.java:1601)
at
org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:45)
at org.openide.util.lookup.Lookups.executeWith(Lookups.java:278)
at
org.netbeans.modules.openide.util.NbMutexEventProvider$Event.lambda$doEventRequest$1(NbMutexEventProvider.java:112)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at
java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
at
org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:136)
at
java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
at
java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
```
### How to reproduce
1. Create a css file.
2. Write the following code.
```css
.test {
}
```
3. java.lang.NullPointerException occurs
### Did this work correctly in an earlier version?
- [X] This used to work!
### Operating System
Ubuntu 20.4
### JDK
Java: 1.8.0_202;
### Apache NetBeans packaging
Own source build
### Anything else
_No response_
### Are you willing to submit a pull request?
- [ ] Yes I am willing to submit a PR!
### Code of Conduct
- [X] I agree to follow the Apache Software Foundation's [Code of
Conduct](https://www.apache.org/foundation/policies/conduct.html)
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