[FLEX-26783] DataGrid ItemRenderer - TypeError: Error #1009

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Not A Problem
• Affects Version/s: Adobe Flex SDK Previous
• Fix Version/s: Adobe Flex SDK 4.5.1 (Release)
• Component/s: Spark: DataGrid
• Environment: Affected OS(s): Mac; Affected OS(s): Mac OS 10.6; Browser: Safari; Language Found: English
• Assignee: Adobe JIRA
• Reporter: Adobe JIRA
• Created: 14/Feb/11 03:07
• Updated: 15/Jun/11 12:48
• Resolved: 14/Feb/11 07:39

Description

I'm using build 4.5.0.19786

Steps to reproduce:

1. Create a app Flex.

2. Introduce this code:
<s:DataGrid>
<s:columns>
<s:ArrayList>
<s:GridColumn>
<s:itemRenderer>
<fx:Component>
<s:Label text="test" />
</fx:Component>
</s:itemRenderer>
</s:GridColumn>
</s:ArrayList>
</s:columns>
</s:DataGrid>

3. Run the app

Actual Results:
TypeError: Error #1009: Cannot access a property or method of a null object reference.
at spark.components::Group/addElement()[E:\dev\hero_private\frameworks\projects\spark\src\spark\components\Group.as:1329]
at spark.components.gridClasses::GridLayout/createTypicalItemRenderer()[E:\dev\hero_private\frameworks\projects\spark\src\spark\components\gridClasses\GridLayout.as:696]
at spark.components.gridClasses::GridLayout/updateTypicalCellSizes()[E:\dev\hero_private\frameworks\projects\spark\src\spark\components\gridClasses\GridLayout.as:823]
at spark.components.gridClasses::GridLayout/measure()[E:\dev\hero_private\frameworks\projects\spark\src\spark\components\gridClasses\GridLayout.as:442]
at spark.components.supportClasses::GroupBase/measure()[E:\dev\hero_private\frameworks\projects\spark\src\spark\components\supportClasses\GroupBase.as:1132]
at mx.core::UIComponent/measureSizes()[E:\dev\hero_private\frameworks\projects\framework\src\mx\core\UIComponent.as:8458]
at mx.core::UIComponent/validateSize()[E:\dev\hero_private\frameworks\projects\framework\src\mx\core\UIComponent.as:8382]
at spark.components::Group/validateSize()[E:\dev\hero_private\frameworks\projects\spark\src\spark\components\Group.as:1000]
at mx.managers::LayoutManager/validateSize()[E:\dev\hero_private\frameworks\projects\framework\src\mx\managers\LayoutManager.as:665]
at mx.managers::LayoutManager/doPhasedInstantiation()[E:\dev\hero_private\frameworks\projects\framework\src\mx\managers\LayoutManager.as:792]
at mx.managers::LayoutManager/doPhasedInstantiationCallback()[E:\dev\hero_private\frameworks\projects\framework\src\mx\managers\LayoutManager.as:1180]