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https://issues.apache.org/jira/browse/PDFBOX-6296?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18135538#comment-18135538
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ASF subversion and git services commented on PDFBOX-6296:
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Commit 1939775 from Tilman Hausherr in branch 'pdfbox/trunk'
[ https://svn.apache.org/r1939775 ]
PDFBOX-6296: improve javadoc; prevent ClassCastException
> Page label merge doesn't consider /Kids
> ---------------------------------------
>
> Key: PDFBOX-6296
> URL: https://issues.apache.org/jira/browse/PDFBOX-6296
> Project: PDFBox
> Issue Type: Bug
> Components: Utilities
> Affects Versions: 2.0.37, 3.0.8 PDFBox
> Reporter: Tilman Hausherr
> Assignee: Tilman Hausherr
> Priority: Major
> Fix For: 2.0.38, 3.0.9 PDFBox, 4.0.0
>
>
> From Claude Sonnet 5.5:
> *Possible NPE in page-label merging.* If the destination's {{/PageLabels}}
> exists but uses {{/Kids}} instead of {{{}/Nums{}}}, {{destNums}} is {{null}}
> and {{destNums.size()}} throws. A related problem: if the destination has
> pages but no labels, the merged {{/Nums}} array starts at a non-zero index,
> which the spec doesn't allow.
> ===
> Additional to the possible NPE, I think the whole merge of page labels is
> broken: this is a number tree but this isn't considered. (Maybe because the
> getTreeAsMap method didn't exist until recently)
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