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https://issues.apache.org/jira/browse/PDFBOX-6288?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18144819#comment-18144819
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Tilman Hausherr commented on PDFBOX-6288:
-----------------------------------------
I was wondering what's going on here. I have the font on my system. The CIDs
with the codes in the PDF do exist and it's space, exclamation and a top-down
heart. If we'd just do code = gid then it would work. My feeling is that it
takes a wrong turn in codeToGID(). There is a comment by me referencing
PDFBOX-5612 and indicating that I wasn't really 100% of what I did there 😂
> Invalid ToUnicode CMap
> ----------------------
>
> Key: PDFBOX-6288
> URL: https://issues.apache.org/jira/browse/PDFBOX-6288
> Project: PDFBox
> Issue Type: Bug
> Reporter: Oliver Schmidtmer
> Priority: Major
> Attachments: MalformedToUnicodeCMap.pdf,
> image-2026-11-12-12-51-25-119.png, image-2026-11-12-12-53-07-456.png,
> image-2026-11-12-12-55-54-029.png, toUnicode-CMAP.patch
>
>
> A problematic PDF file contains a "ToUnicode CMap" that uses "begincidrange"
> instead of "beginbfchar" or "beginbfrange".
> Since the CMap is ignored in this case, the wrong glyphs are used during
> rendering. Because the file displays correctly in Acrobat, a workaround might
> be justified.
> The attached PDF file is a generated example, as the original contains
> sensitive data. I used Copilot for the analysis and to create a potential
> patch:
> https://github.com/Schmidor/pdfbox/commit/425e83caaa28c66e6e4438c7818f0eb0a448fae9
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