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From "Jesse Wilson (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HARMONY-6236) ArrayList breaks when given concurrent collections as input
Date Mon, 15 Jun 2009 22:28:07 GMT

    [ https://issues.apache.org/jira/browse/HARMONY-6236?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12719822#action_12719822
] 

Jesse Wilson commented on HARMONY-6236:
---------------------------------------

FYI, this problem was encountered while integrating the latest Harmony into Android.

> ArrayList breaks when given concurrent collections as input
> -----------------------------------------------------------
>
>                 Key: HARMONY-6236
>                 URL: https://issues.apache.org/jira/browse/HARMONY-6236
>             Project: Harmony
>          Issue Type: Bug
>          Components: Classlib
>    Affects Versions: 5.0M10
>         Environment: SVN Revision: 784898
>            Reporter: Jesse Wilson
>   Original Estimate: 0.5h
>  Remaining Estimate: 0.5h
>
> new ArrayList() and ArrayList.addAll(Collection) assume the passed-in collection will
not change between calls. 
> In the attached test case, a special collection simulates a background thread calling
"remove" after the ArrayList has called size(), but before it has called "toArray()". This
causes the collection to return a null-padded array, which leads to a corrupt ArrayList. The
attached patch fixes the problem.

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