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https://issues.apache.org/jira/browse/FLEX-35043?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mihai Chira updated FLEX-35043:
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Affects Version/s: Apache Flex 4.15.0
> Unexpected behaviour of ListCollectionView.itemUpdated() when only one
> parameter supplied
> -----------------------------------------------------------------------------------------
>
> Key: FLEX-35043
> URL: https://issues.apache.org/jira/browse/FLEX-35043
> Project: Apache Flex
> Issue Type: Bug
> Components: Collections
> Affects Versions: Apache Flex 4.15.0
> Reporter: Mihai Chira
> Assignee: Mihai Chira
>
> when calling itemUpdated(item) on a collection with only the first parameter
> provided (which developers usually do to signal that some - unspecified -
> properties of the item have changed),
> ListCollectionView.handlePropertyChangeEvents() would treat that as if the
> object has been just introduced to the collection, replacing a null value -
> since oldValue was null, and property was also null. (That's because the
> "property" value of the PropertyChangeEvent was null, which was taken to mean
> that the oldValue - which was also null - was changed into that item, i.e.
> the object reference changed in the collection, not just one of the object's
> properties.) As such, it would try to remove that supposedly existing null
> value from the collection (and sometimes a null does exist, but shouldn't be
> removed).
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