entlicher opened a new issue, #8806:
URL: https://github.com/apache/netbeans/issues/8806
### Apache NetBeans version
Apache NetBeans 27
### What happened
This is a transient issue in debugger tests:
```
java.lang.NullPointerException: Cannot invoke
"org.netbeans.api.debugger.jpda.JPDADebugger.removePropertyChangeListener(String,
java.beans.PropertyChangeListener)" because "this.debugger" is null
at
org.netbeans.modules.debugger.jpda.console.DebuggerOutput.destroy(DebuggerOutput.java:113)
at
org.netbeans.modules.debugger.jpda.console.DebuggerOutput.propertyChange(DebuggerOutput.java:274)
at
java.desktop/java.beans.PropertyChangeSupport.fire(PropertyChangeSupport.java:343)
at
java.desktop/java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:336)
at
org.netbeans.modules.debugger.jpda.JPDADebuggerImpl.firePropertyChange(JPDADebuggerImpl.java:2253)
at
org.netbeans.modules.debugger.jpda.JPDADebuggerImpl.resume(JPDADebuggerImpl.java:1793)
at
org.netbeans.modules.debugger.jpda.actions.ContinueActionProvider.doAction(ContinueActionProvider.java:58)
at
org.netbeans.spi.debugger.ActionsProvider$ContextAware.doAction(ActionsProvider.java:234)
at
org.netbeans.api.debugger.ActionsManager.doAction(ActionsManager.java:152)
at
org.netbeans.api.debugger.jpda.JPDASupport.doContinue(JPDASupport.java:315)
at
org.netbeans.api.debugger.jpda.CallStackTest.testInstanceCallStackInfo(CallStackTest.java:140)
at
java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.base/java.lang.reflect.Method.invoke(Method.java:580)
at junit.framework.TestCase.runTest(TestCase.java:177)
at org.netbeans.junit.NbTestCase.access$200(NbTestCase.java:84)
at org.netbeans.junit.NbTestCase$2.doSomething(NbTestCase.java:489)
at org.netbeans.junit.NbTestCase$1Guard.run(NbTestCase.java:410)
```
### Language / Project Type / NetBeans Component
Java Debugger
### How to reproduce
Run JPDA tests.
### Did this work correctly in an earlier version?
No / Don't know
### Operating System
Any
### JDK
Any
### Apache NetBeans packaging
Other
### Anything else
_No response_
### Are you willing to submit a pull request?
No
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