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https://issues.apache.org/jira/browse/JENA-60?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13021203#comment-13021203
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Yonathan Randolph commented on JENA-60:
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I realized that for some iterators like FilterITerator it is impossible to call
remove() after hasNext(), so I guess I shouldn't expect andThen to work when
you call them in the wrong order either.
> NiceIterator.andThen: remove() has minor bug
> --------------------------------------------
>
> Key: JENA-60
> URL: https://issues.apache.org/jira/browse/JENA-60
> Project: Jena
> Issue Type: Bug
> Reporter: Andy Seaborne
> Assignee: christopher james dollin
>
> regarding com.hp.hpl.jena.util.iterator.NiceIterator:
> If you have a NiceIterator and you do andThen and call
> it.hasNext();
> it.remove();
> it can try to remove() from the wrong underlying iterator. Remove should call
> remove() on the iterator that returned the previous next(), not current.
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