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Bug 317135

Summary:	Null pointer exception in Tree.collapseItem_collapseChildren
Product:	[Eclipse Project] Platform	Reporter:	Chris Allen <kosmos2121>
Component:	SWT	Assignee:	Platform-SWT-Inbox <platform-swt-inbox>
Status:	RESOLVED FIXED	QA Contact:
Severity:	normal
Priority:	P3	CC:	lshanmug, skovatch
Version:	3.6
Target Milestone:	3.7.1
Hardware:	Macintosh
OS:	Mac OS X
Whiteboard:

Description Chris Allen

2010-06-16 21:19:01 EDT

Build Identifier: M20100211-1343

I am having an issue where when I collapse a Tree branch, I get a null pointer exception in Tree.collapseItem_collapseChildren.  In reviewing the swt code, it looks like (TreeItem)display.getWidget(itemID) can potentially return null and there is no checking to catch this case.  Why it's returning null, I do not know yet, but it seems like you'd want to catch it just in case.  I have tried using SWT versions swt-3.5.2-cocoa-macosx-x86_64 and swt-3.6RC4-cocoa-macosx-x86_64.  I am running the latest version of Java 6 (1.6.0_20-b02-279-9M3165) on OSX 10.5.8 (Mac OS X Server 10.5.8 (9L34)).  Any suggestions to help identify if there is a problem in my code would be appreciated.

Reproducible: Sometimes

Steps to Reproduce:
1. click on tree branch that contains sub objects to collapse the tree
2.
3.

Comment 1 Scott Kovatch

2010-07-06 17:35:03 EDT

This sounds like bug 309753, but you're reporting it against 3.6RC4 and we fixed that for 3.6RC1. Can you paste in a stack trace of the exception?

Comment 2 Lakshmi P Shanmugam

2017-07-03 05:36:35 EDT

Null check has been added via Bug 326311. Marking as fixed.