nullpointer exception trying to save a layout

[bobchin318]

Apache NetBeans version

Apache NetBeans 13

What happened

Trying to save a form that has nested tabbed panes and some panes inside of those. Error message is generated and Netbeans will not save/exit. Error dump follows:

java.lang.NullPointerException
	at org.netbeans.modules.form.layoutdesign.LayoutPersistenceManager.saveLayout(LayoutPersistenceManager.java:133)
	at org.netbeans.modules.form.layoutdesign.LayoutPersistenceManager.saveContainer(LayoutPersistenceManager.java:113)
	at org.netbeans.modules.form.layoutdesign.LayoutModel.saveContainerLayout(LayoutModel.java:1193)
	at org.netbeans.modules.form.GandalfPersistenceManager.saveLayout(GandalfPersistenceManager.java:3385)
	at org.netbeans.modules.form.GandalfPersistenceManager.saveContainer(GandalfPersistenceManager.java:3339)
	at org.netbeans.modules.form.GandalfPersistenceManager.saveAnyComponent(GandalfPersistenceManager.java:3312)
	at org.netbeans.modules.form.GandalfPersistenceManager.saveContainer(GandalfPersistenceManager.java:3356)
	at org.netbeans.modules.form.GandalfPersistenceManager.saveAnyComponent(GandalfPersistenceManager.java:3312)
	at org.netbeans.modules.form.GandalfPersistenceManager.saveContainer(GandalfPersistenceManager.java:3356)
	at org.netbeans.modules.form.GandalfPersistenceManager.saveAnyComponent(GandalfPersistenceManager.java:3312)
	at org.netbeans.modules.form.GandalfPersistenceManager.saveContainer(GandalfPersistenceManager.java:3356)
	at org.netbeans.modules.form.GandalfPersistenceManager.saveAnyComponent(GandalfPersistenceManager.java:3312)
	at org.netbeans.modules.form.GandalfPersistenceManager.saveForm(GandalfPersistenceManager.java:3194)
	at org.netbeans.modules.form.GandalfPersistenceManager.saveForm(GandalfPersistenceManager.java:3116)
	at org.netbeans.modules.form.FormEditor.saveFormData(FormEditor.java:397)
	at org.netbeans.modules.nbform.FormEditorSupport.saveDocument(FormEditorSupport.java:476)
	at org.netbeans.modules.nbform.FormEditorSupport$16.doSave(FormEditorSupport.java:1611)
	at org.netbeans.modules.nbform.FormEditorSupport$16.access$1300(FormEditorSupport.java:1582)
	at org.netbeans.modules.nbform.FormEditorSupport$16$1.run(FormEditorSupport.java:1594)
	at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:303)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:770)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:715)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
	at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:740)
	at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:136)
	at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
[catch] at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)

How to reproduce

I don't know how to do this here. It is a .java file that i am trying to save. Nullpointer exception means maybe I missed something?

Did this work correctly in an earlier version?

Apache NetBeans 13

Operating System

Ubunutu 20.04

JDK

JDK 11

Apache NetBeans packaging

Apache NetBeans binary zip

Anything else

Everything I try to save, it fails with the above error message.

Are you willing to submit a pull request?

Yes

Code of Conduct

Yes

[matthiasblaesing]

Is this problem reproducible? If not, this is a single incident and most probably not really fixable. If it is reproducible, please provide the steps, that need to be taken.