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https://issues.apache.org/jira/browse/LUCENE-2953?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13003878#comment-13003878
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Dawid Weiss commented on LUCENE-2953:
-------------------------------------
I remember using pq at some point for other things and hating that initialize
method, so I'm all for it.
> PriorityQueue is inheriently broken if subclass attempts to use "heap"
> w/generic T bound to anything other then "Object"
> ------------------------------------------------------------------------------------------------------------------------
>
> Key: LUCENE-2953
> URL: https://issues.apache.org/jira/browse/LUCENE-2953
> Project: Lucene - Java
> Issue Type: Bug
> Reporter: Hoss Man
> Attachments: BenchmarkArrayAccess.java, LUCENE-2953.patch
>
>
> as discovered in SOLR-2410 the fact that the protected "heap" variable in
> PriorityQueue is initialized using an Object[] makes it impossible for
> subclasses of PriorityQueue to exist and access the "heap" array unless they
> bind the generic to Object.
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