Roland Zwaga created FLEX-33156:
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             Summary: focusInHandler() in spark Scroller doesn't null check 
focusManager property before using
                 Key: FLEX-33156
                 URL: https://issues.apache.org/jira/browse/FLEX-33156
             Project: Apache Flex
          Issue Type: Bug
          Components: Spark: Scroller
    Affects Versions: Adobe Flex SDK 4.6 (Release)
            Reporter: Roland Zwaga
             Fix For: Adobe Flex SDK Next


the focusHandler() method wrongfully assumes that the focusManager is always a 
valid instance. When checking the focusManager property in UIComponent it is 
clear that in certain cases this property can return a null value.

So in some cases this can lead to an RTE. I have encountered this once in my 
current project but find it very hard to reproduce. Basically a Scroller 
instance that was displayed in a popup window gave this RTE after the popup was 
removed.

Reproducable or not, I believe the null check should be added seeing the fact 
that the focusManager property explicitly returns null in some cases.

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