[FLEX-22750] After tabbing spark window's last child, a RTE is returned.

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Adobe Flex SDK Previous
• Component/s: Spark: Window
• Environment: Affected OS(s): All OS Platforms; Language Found: English
• Assignee: Adobe JIRA
• Reporter: Adobe JIRA
• Created: 14/Jan/10 13:49
• Updated: 15/Apr/11 14:56
• Resolved: 15/Jan/10 13:59

Description

Steps to reproduce:
1. compile/run test app
2. first focus on window
3. hit tab to tab the components inside the window

Actual Results:
after tabbing the last component, an runtime error is received:
ReferenceError: Error #1069: Property hostComponent not found on spark.skins.spark.windowChrome.GripperSkin and there is no default value.
at spark.components.supportClasses::Skin/beginHighlightBitmapCapture()
at spark.skins.spark::HighlightBitmapCaptureSkin/updateDisplayList()
at spark.skins.spark::FocusSkin/updateDisplayList()
at mx.core::UIComponent/validateDisplayList()
at mx.managers::LayoutManager/validateDisplayList()
at mx.managers::LayoutManager/doPhasedInstantiation()
at mx.managers::LayoutManager/doPhasedInstantiationCallback()

Expected Results:
no error

Workaround (if any):