[FLEX-25291] RadioButtons created in nested containers are not garbage collected when the containers children are removed, causing memory leak

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: Adobe Flex SDK 3.5 (Release)
• Component/s: mx: RadioButton
• Environment: Affected OS(s): All OS Platforms; Affected OS(s): All OS Platforms; Language Found: English
• Assignee: Unassigned
• Reporter: Adobe JIRA
• Created: 15/Sep/10 09:49
• Updated: 15/Sep/10 09:49

Description

Steps to reproduce:
1.Dynamically created N RadioButtons inside GridRows/GridItems of a Grid myGrid
2.Call myGrid.removeAllChildren();
3.The radio buttons are still referenced in the automaticRadioButtonGroups, and won't be garbage collected
document.automaticRadioButtonGroups[groupName].radioButtons

Actual Results:
The radio buttons are not garbage collected

Expected Results:
The radio buttons must be garbage collected

Workaround (if any):
use an explicit RadioButtonGroup and clear it/ renew it manually after the removeAll();

NB: looking at the open source code, the bug seems to be in the RadioButtonGroup.addInstance() function:
mx_internal function addInstance(instance:RadioButton):void

{ instance.indexNumber = indexNumber++; instance.addEventListener(Event.REMOVED, radioButton_removedHandler); }

should use Event.REMOVED_FROM_STAGE instead of Event.REMOVED.