Thomas A. Szczechowiak created FLEX-34896:
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Summary: Null Error #1009 in mx.controls.DataGridColumn.as at line
1803
Key: FLEX-34896
URL: https://issues.apache.org/jira/browse/FLEX-34896
Project: Apache Flex
Issue Type: Bug
Components: mx: DataGrid
Affects Versions: Apache Flex 4.14.0
Environment: Windows XP/7, IE and Firefox with various flash players.
Other browsers/OS not testable.
Reporter: Thomas A. Szczechowiak
Fix For: Adobe Flex SDK 4.1 (Release)
Working on upgrading an older application from Flex SDK 4.1 to 4.14 (was
originally built on SDK 3.0 and migrated along the way without any massive
refactors, very limited use of Spark) and only just started encountering this
error. Does not happen with all of the grids in the app but have had no
success in tracking down why some of them are behaving differently. We do have
the grids extended heavily making wholesale conversion to Spark time consuming
and problematic.
At line 1803 there is an attempt to get data[field] with no null checks on
data. Somehow it is getting here while data is null causing this error.
typeof(null) == "object" returns true.
Following stack trace was hand typed if there are any typos (impossible to copy
stack or any code from other machine, have not been able to make a test app
that recreates the problem)
mx.controls.dataGridClasses::DataGridColumn/itemToDataTip
mx.controls.dataGridClasses::DataGridItemRenderer/validateProperties
mx.managers::LayoutManager/validateClient
mx.controls::DataGrid/http://www.adobe.com/2006/flex/mx/internal::calculateHeaderHeight
mx.controls.dataGridClasses::DataGridHeader/measure
mx.core::UIComponent/http://www.adobe.com/2006/flex/mx/internal::measureSizes
mx.core::UIComponent/validateSize
mx.managers::LayoutManager/validateSize
mx.managers::LayoutManager/doPhasedInstantiation
mx.managers::LayoutManager/doPhasedInstantiationCallback
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