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Bug 132456 - NullPointerException at org.netbeans.modules.debugger.jpda.models.LocalsTreeModel.getChildrenImpl
Summary: NullPointerException at org.netbeans.modules.debugger.jpda.models.LocalsTreeM...
Alias: None
Product: debugger
Classification: Unclassified
Component: Java (show other bugs)
Version: 6.x
Hardware: All All
: P3 blocker (vote)
Assignee: Martin Entlicher
Depends on:
Reported: 2008-04-09 19:20 UTC by axiomsofchoice
Modified: 2008-06-04 08:39 UTC (History)
1 user (show)

See Also:
Issue Type: DEFECT
Exception Reporter: 45253

stacktrace (1.23 KB, text/plain)
2008-04-09 19:20 UTC, axiomsofchoice
Suggested patch for (888 bytes, patch)
2008-04-10 16:59 UTC, rbalada
Details | Diff

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Description axiomsofchoice 2008-04-09 19:20:03 UTC
Build: NetBeans IDE Dev (Build 200804050004)
VM: Java HotSpot(TM) Client VM, 10.0-b19, Java(TM) SE Runtime Environment, 1.6.0_04-b12
OS: Windows XP, 5.1, x86

User Comments: 
Comment 1 axiomsofchoice 2008-04-09 19:20:11 UTC
Created attachment 59926 [details]
Comment 2 Martin Entlicher 2008-04-09 19:48:34 UTC
It's likely that the thread was resumed right before this call, which cleared the last operations and caused this NPE.
A check for null last operations will fix this.
Comment 3 rbalada 2008-04-10 16:59:23 UTC
Created attachment 59997 [details]
Suggested patch for
Comment 4 rbalada 2008-04-10 17:06:40 UTC
Fixed in main
Comment 5 rbalada 2008-04-10 17:13:45 UTC
Fixed in main
Comment 6 Jiri Vagner 2008-04-29 13:01:15 UTC
I'm not able to verify this issue, there are no steps to reproduce.  But "if" condition looks cool and I am sure that
this npe was fixed correctly.

Verified in nb_iz_132456_patch_1.txt :)
Comment 7 rbalada 2008-04-29 13:29:45 UTC
I've backported the changeset into release61_fixes repository as

changeset:   77486:c2c5ad6cd49b
tag:         tip
user:        Rudolf Balada <>
date:        Thu Apr 10 18:00:46 2008 +0200
summary:     IZ 132456: NullPointerException at org.netbeans.modules.debugger.jpda.models.LocalsTreeModel.getChildrenImpl