João Fernandes created FLEX-33263:
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             Summary: FocusOut in datagrid causes RTE if target.parent is null
                 Key: FLEX-33263
                 URL: https://issues.apache.org/jira/browse/FLEX-33263
             Project: Apache Flex
          Issue Type: Bug
          Components: mx: DataGrid
    Affects Versions: Apache Flex 4.8 (parity release)
            Reporter: João Fernandes


during focusOutHandler, there is a condition that access target.parent.parent 
without checking if target.parent is null or not.
There is a quick fix by inverting the 2 last conditions so at line 5017 instead 
of having

if (target is IListItemRenderer && target.parent.parent == this && 
target.parent is ListBaseContentHolder)

we should have

if (target is IListItemRenderer && target.parent is ListBaseContentHolder && 
target.parent.parent == this)

this way, it will never throw an RTE because if target.parent is null, it will 
never evaluate the last portion.

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