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https://issues.apache.org/jira/browse/FOP-2993?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17260576#comment-17260576
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Simon Steiner commented on FOP-2993:
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We support pdfbox 2.0.19, newer are not yet supported
> With PDFBox 2.0.22: Failed to embed font / Illegal offSize value 0 in CFF font
> ------------------------------------------------------------------------------
>
> Key: FOP-2993
> URL: https://issues.apache.org/jira/browse/FOP-2993
> Project: FOP
> Issue Type: Bug
> Components: font/opentype
> Affects Versions: 2.5
> Environment: Arch Linux
> Reporter: Justus Piater
> Priority: Major
> Attachments: exception-backtrace.txt, fop.xconf
>
>
> This bug did not show with PDFBox 2.0.21 and appeared with PDFBox 2.0.22 so
> it may actually be a bug in PDFBox (or with this font). However, it may be
> related to [PDFBOX-5033|https://issues.apache.org/jira/browse/PDFBOX-5033].
> Moreover, I have no use for PDFBox besides FOP and don't know how to test the
> fontbox jar without FOP.
> To trigger this bug, run fop on this this .fo:
> {code:xml}
> <fo:root xmlns:fo="http://www.w3.org/1999/XSL/Format";>
> <fo:layout-master-set>
> <fo:simple-page-master master-name="one">
> <fo:region-body />
> </fo:simple-page-master>
> </fo:layout-master-set>
> <fo:page-sequence master-reference="one">
> <fo:flow flow-name="xsl-region-body">
> <fo:block font-family="FreeMono">Text</fo:block>
> </fo:flow>
> </fo:page-sequence>
> </fo:root>
> {code}
> This causes the following exception; the full exception backtrace is
> attached:
> {{Jan 07, 2021 11:44:37 AM org.apache.fop.apps.FOUserAgent processEvent}}
> {{INFO: Rendered page #1.}}
> {{Jan 07, 2021 11:44:37 AM org.apache.fop.pdf.PDFFactory makeFontFile}}
> {{SEVERE: Failed to embed font
> \[org.apache.fop.fonts.LazyFont@5d25e6bb\{FreeMono}\{metrics-url=null,embed-url=/usr/share/fonts/gnu-free/FreeMono.otf,kerning=true,advanced=true}]
> FreeMono}}
> {{java.io.IOException: Illegal (< 1 or > 4) offSize value 0 in CFF font at
> position 42277}}
> {{at org.apache.fontbox.cff.CFFDataInput.readOffSize(CFFDataInput.java:85)}}
> This bug triggers with all GNU Free fonts, but not with any of the other OTF
> fonts I tried.
> I also attach my fop.xconf (with explicit <font> specifications because of
> FOP-2591).
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