[FLEX-23513] Null Pointer in update display list of scroll bar.

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: Adobe Flex SDK 4.0 (Release)
• Fix Version/s: Adobe Flex SDK Previous
• Component/s: Spark: TrackBase
• Environment: Affected OS(s): All OS Platforms; Language Found: English
• Assignee: Adobe JIRA
• Reporter: Adobe JIRA
• Created: 18/Mar/10 14:55
• Updated: 10/May/11 13:43
• Resolved: 14/Jul/10 16:25

Description

Somewhat intermittent. as list gets big enough to scroll, then scroll bars go away it seems to happen.

Kevin thinks a simple null check is required.

Actual Results:

TypeError: Error #1009: Cannot access a property or method of a null object reference.
at spark.components::VScrollBar/updateSkinDisplayList()[E:\dev\4.0.0\frameworks\projects\spark\src\spark\components\VScrollBar.as:222]
at spark.components.supportClasses::TrackBase/updateDisplayList()[E:\dev\4.0.0\frameworks\projects\spark\src\spark\components\supportClasses\TrackBase.as:476]
at mx.core::UIComponent/validateDisplayList()[E:\dev\4.0.0\frameworks\projects\framework\src\mx\core\UIComponent.as:8531]
at mx.managers::LayoutManager/validateDisplayList()[E:\dev\4.0.0\frameworks\projects\framework\src\mx\managers\LayoutManager.as:663]
at mx.managers::LayoutManager/doPhasedInstantiation()[E:\dev\4.0.0\frameworks\projects\framework\src\mx\managers\LayoutManager.as:736]
at mx.managers::LayoutManager/doPhasedInstantiationCallback()[E:\dev\4.0.0\frameworks\projects\framework\src\mx\managers\LayoutManager.as:1072]