[FLEX-16303] RTE when quickly tabbing through Gumbo controls

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Adobe Flex SDK Previous
• Fix Version/s: Adobe Flex SDK 4.0 (Release)
• Component/s: Spark: Application
• Environment: Affected OS(s): All OS Platforms; Affected OS(s): All OS Platforms; Language Found: English
• Assignee: Adobe JIRA
• Reporter: Adobe JIRA
• Created: 27/Oct/08 15:33
• Updated: 15/Apr/11 15:32
• Resolved: 23/Jan/09 16:40

Description

Steps to reproduce:
1. Compile and run attached MXML file (or run SWF).
2. Quickly tab through controls by clicking Tab key "kinda fast". You shouldn't hit any errors.
3. Hold down the tab key.

Actual Results:
TypeError: Error #1009: Cannot access a property or method of a null object reference.
at mx.skins.spark::FxFocusSkin/updateDisplayList()[E:\dev\gumbo_alpha\frameworks\projects\flex4\src\mx\skins\spark\FxFocusSkin.as:91]
at mx.core::UIComponent/validateDisplayList()[E:\dev\gumbo_alpha\frameworks\projects\framework\src\mx\core\UIComponent.as:6729]
at mx.managers::LayoutManager/validateDisplayList()[E:\dev\gumbo_alpha\frameworks\projects\framework\src\mx\managers\LayoutManager.as:622]
at mx.managers::LayoutManager/doPhasedInstantiation()[E:\dev\gumbo_alpha\frameworks\projects\framework\src\mx\managers\LayoutManager.as:695]
at Function/http://adobe.com/AS3/2006/builtin::apply()
at mx.core::UIComponent/callLaterDispatcher2()[E:\dev\gumbo_alpha\frameworks\projects\framework\src\mx\core\UIComponent.as:8831]
at mx.core::UIComponent/callLaterDispatcher()[E:\dev\gumbo_alpha\frameworks\projects\framework\src\mx\core\UIComponent.as:8771]

Expected Results:
No RTE.

Workaround (if any):
n/a