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Bug 129877 - NullPointerException at org.netbeans.modules.form.FormDesigner$3.propertyChange
Summary: NullPointerException at org.netbeans.modules.form.FormDesigner$3.propertyChange
Status: VERIFIED FIXED
Alias: None
Product: guibuilder
Classification: Unclassified
Component: Code (show other bugs)
Version: 6.x
Hardware: All All
: P3 blocker (vote)
Assignee: issues@guibuilder
URL: http://statistics.netbeans.org/except...
Keywords:
Depends on:
Blocks:
 
Reported: 2008-03-12 10:51 UTC by novakm
Modified: 2008-03-20 12:28 UTC (History)
0 users

See Also:
Issue Type: DEFECT
Exception Reporter: 11277

Attachments
stacktrace (1.44 KB, text/plain)
2008-03-12 10:51 UTC, novakm 		Details
stacktrace (1.44 KB, text/plain)
2008-03-12 11:30 UTC, Marian Petras 		Details
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Description novakm 2008-03-12 10:51:31 UTC 
Build: NetBeans IDE Dev (Build 200803111205)
VM: Java HotSpot(TM) Client VM, 10.0-b19
OS: Windows Vista, 6.0, x86

User Comments: 
I was just closing several tabs in editor area. The last tab was one JFrame with only one button in it. After I closed it, NPE was thrown
Comment 1 novakm 2008-03-12 10:51:35 UTC 
Created attachment 58216 [details]
stacktrace
Comment 2 novakm 2008-03-12 11:06:14 UTC 
I just got the same exception when writing some code and using code completion for an action for that one button.
Comment 3 Marian Petras 2008-03-12 11:30:47 UTC 
Build: NetBeans IDE Dev (Build 080311)
VM: Java HotSpot(TM) Client VM, 11.0-b11
OS: Linux, 2.6.22-14-generic, i386

User Comments: 
I closed a Java editor coupled with a form editor (but the source editor was active).
Comment 4 Marian Petras 2008-03-12 11:30:50 UTC 
Created attachment 58218 [details]
stacktrace
Comment 5 Jana Maleckova 2008-03-12 11:45:06 UTC 
StackTrace:
===========
java.lang.NullPointerException
        at org.netbeans.modules.form.FormDesigner$3.propertyChange(FormDesigner.java:264)
        at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:339)
        at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:347)
        at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:276)
        at java.awt.Component.firePropertyChange(Component.java:7926)
Comment 6 Jan Stola 2008-03-12 11:58:03 UTC 
I was not able to reproduce this issue, but it seems to be a race-condition during closing of form. Probably an attempt 
for lazy synchronization of already closed form.
Fixed, hopefully.

Modified file: http://hg.netbeans.org/main?cmd=changeset;node=d4b1e4960e23
Comment 7 novakm 2008-03-20 12:28:10 UTC 
Unable to reproduce now, verified.