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https://issues.apache.org/jira/browse/PDFBOX-4550?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16866806#comment-16866806
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Andreas Lehmkühler commented on PDFBOX-4550:
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The last files weren't corrupt. The CMaps consists of an array with more than
255 values. I've limited the check (range with more than 255 values) to the
increment variant. Everything should work again.
> Poor performance with corrupt ToUnicode stream
> ----------------------------------------------
>
> Key: PDFBOX-4550
> URL: https://issues.apache.org/jira/browse/PDFBOX-4550
> Project: PDFBox
> Issue Type: Bug
> Components: Rendering, Text extraction
> Affects Versions: 2.0.15
> Reporter: Tilman Hausherr
> Assignee: Andreas Lehmkühler
> Priority: Major
> Fix For: 2.0.16, 3.0.0 PDFBox
>
> Attachments: 169997-p1.pdf, EF6E2XR2XAXWUHZV5STGMYPWNNDLXDDT-p2.pdf,
> PDFBOX-3442-DirectResources.pdf, PDFBOX-3442-DirectResources_unc.pdf,
> PDFBOX-4550-LG5S35JUXSEH5XJC6QYISY3OBUXCKAKR-p1-reduced.pdf, pdnekz1gvl7.pdf
>
>
> A confidential file with lots of corrupt streams has ToUnicode stream with
> corrupt contents in the beginbfrange segment where start and end have
> different lengths. This leads to poor performance. Such entries can be
> skipped.
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