[FLEX-23806] Setting focus to a component and then making it invisible cause a RTE

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: Adobe Flex SDK 4.1 (Release)
• Component/s: Focus Manager
• Environment: Affected OS(s): All OS Platforms; Language Found: English
• Assignee: Adobe JIRA
• Reporter: Adobe JIRA
• Created: 20/Apr/10 11:07
• Updated: 01/Jul/10 13:11
• Resolved: 01/Jul/10 10:18

Description

Steps to reproduce:
1. Load the application with the following code:
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx" width="800" height="600"
xmlns:comps="*" creationComplete="makeInvisible()">

<fx:Script>
<![CDATA[

private function makeInvisible(): void

{ b1.setFocus() b1.visible=false; }

]]
>
</fx:Script>

<s:Button id="b1" label="open calendar" />
<s:Button label="invisible" id="btn2" y="120" />

</s:Application>

Actual Results: RTE
TypeError: Error #1009: Cannot access a property or method of a null object reference.
at mx.managers::FocusManager/childHideHandler()[E:\dev\4.x\frameworks\projects\framework\src\mx\managers\FocusManager.as:1759]
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at mx.core::UIComponent/dispatchEvent()[E:\dev\4.x\frameworks\projects\framework\src\mx\core\UIComponent.as:12528]
at mx.core::UIComponent/setVisible()[E:\dev\4.x\frameworks\projects\framework\src\mx\core\UIComponent.as:3088]
at mx.core::UIComponent/set visible()[E:\dev\4.x\frameworks\projects\framework\src\mx\core\UIComponent.as:3047]
at Flex4Tests/makeInvisible()[C:\Documents and Settings\tan\Adobe Flash Builder Beta 3\Flex4Tests\src\Flex4Tests.mxml:12]
at Flex4Tests/___Flex4Tests_Application1_creationComplete()[C:\Documents and Settings\tan\Adobe Flash Builder Beta 3\Flex4Tests\src\Flex4Tests.mxml:5]
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at mx.core::UIComponent/dispatchEvent()[E:\dev\4.x\frameworks\projects\framework\src\mx\core\UIComponent.as:12528]
at mx.core::UIComponent/set initialized()[E:\dev\4.x\frameworks\projects\framework\src\mx\core\UIComponent.as:1627]
at mx.managers::LayoutManager/doPhasedInstantiation()[E:\dev\4.x\frameworks\projects\framework\src\mx\managers\LayoutManager.as:759]
at mx.managers::LayoutManager/doPhasedInstantiationCallback()[E:\dev\4.x\frameworks\projects\framework\src\mx\managers\LayoutManager.as:1072]

Expected Results:
no runtime error

Workaround (if any):