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From "Roland Zwaga (JIRA)" <j...@apache.org>
Subject [jira] [Created] (FLEX-33156) focusInHandler() in spark Scroller doesn't null check focusManager property before using
Date Fri, 03 Aug 2012 09:00:04 GMT
Roland Zwaga created FLEX-33156:
-----------------------------------

             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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