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https://issues.apache.org/jira/browse/COLLECTIONS-447?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jeffrey Barnes updated COLLECTIONS-447:
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Attachment: fix.patch
testcase.patch
> TreeListIterator can return incorrect results after remove() is called
> ----------------------------------------------------------------------
>
> Key: COLLECTIONS-447
> URL: https://issues.apache.org/jira/browse/COLLECTIONS-447
> Project: Commons Collections
> Issue Type: Bug
> Components: Collection
> Affects Versions: Nightly Builds
> Environment: Windows 7, jdk1.5.0_22
> Reporter: Jeffrey Barnes
> Labels: patch, test
> Attachments: fix.patch, testcase.patch
>
>
> {{TreeList.TreeListIterator}} can get in a bad state when {{remove()}} is
> called, causing it to subsequently return incorrect results. This is because
> {{TreeListIterator}} caches an {{AVLNode}} reference in its field {{next}},
> and this node reference may become stale when {{remove()}} is called (it may
> contain a reference to a node that no longer exists in the tree).
> I will attach two patches: {{testcase.patch}} will contain a test case
> illustrating the bug, and {{fix.patch}} will contain a fix. (To fix the bug,
> I simply clear the cached {{next}} value in {{TreeListIterator.remove}}.)
> This was originally reported in a comment to COLLECTIONS-433; I am creating a
> separate issue for this at Thomas Neidhart's suggestion.
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