changing project group shows an exception in the log

[wumpz]

Apache NetBeans version

Apache NetBeans 18

What happened

I changed the project group from one to another and this exception occurred:

java.lang.NullPointerException: Cannot invoke "java.util.Set.add(Object)" because "pwnr" is null
	at org.netbeans.modules.project.ui.ProjectUtilities$1.doClose(ProjectUtilities.java:155)
	at org.netbeans.modules.project.ui.ProjectUtilities$1.close(ProjectUtilities.java:116)
	at org.netbeans.modules.project.ui.ProjectUtilities.closeAllDocuments(ProjectUtilities.java:480)
	at org.netbeans.modules.project.ui.OpenProjectList.close(OpenProjectList.java:923)
	at org.netbeans.modules.project.ui.groups.Group.open(Group.java:586)
	at org.netbeans.modules.project.ui.groups.Group.setActiveGroup(Group.java:180)
	at org.netbeans.modules.project.ui.groups.ManageGroupsPanel$2$1.run(ManageGroupsPanel.java:80)
	at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1419)
	at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:45)
	at org.openide.util.lookup.Lookups.executeWith(Lookups.java:287)
[catch] at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2034)

How to reproduce

I don't know. After a restart of Netbeans I am able to switch project groups without this exception.

Did this work correctly in an earlier version?

No / Don't know

Operating System

Windows 11

JDK

JDK 17

Apache NetBeans packaging

Apache NetBeans provided installer

Anything else

No response

Are you willing to submit a pull request?

No

[neilcsmith-net]

Thanks for the report. Have seen this too when testing builds. Should be fine after restart.

[mbien]

might have found the cause for this by accident. will link the PR with this issue once done.