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https://issues.apache.org/jira/browse/PDFBOX-4959?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17198775#comment-17198775
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Andreas Lehmkühler commented on PDFBOX-4959:
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Sounds like a malformed pdf. Please attach the file in question
> org.apache.pdfbox.cos.COSStream cannot be cast to
> org.apache.pdfbox.cos.COSNumber
> ---------------------------------------------------------------------------------
>
> Key: PDFBOX-4959
> URL: https://issues.apache.org/jira/browse/PDFBOX-4959
> Project: PDFBox
> Issue Type: Bug
> Components: Rendering
> Affects Versions: 2.0.21
> Environment: Windows 10
> Reporter: Wim Maerevoet
> Priority: Major
> Fix For: 2.0.22, 3.0.0 PDFBox
>
>
> java.lang.ClassCastException: org.apache.pdfbox.cos.COSStream cannot be cast
> to org.apache.pdfbox.cos.COSNumber
> at org.apache.pdfbox.pdmodel.font.PDCIDFont.readWidths(PDCIDFont.java:90)
> at org.apache.pdfbox.pdmodel.font.PDCIDFont.<init>(PDCIDFont.java:66)
> at
> org.apache.pdfbox.pdmodel.font.PDCIDFontType2.<init>(PDCIDFontType2.java:78)
> at
> org.apache.pdfbox.pdmodel.font.PDCIDFontType2.<init>(PDCIDFontType2.java:65)
> at
> org.apache.pdfbox.pdmodel.font.PDFontFactory.createDescendantFont(PDFontFactory.java:139)
> at org.apache.pdfbox.pdmodel.font.PDType0Font.<init>(PDType0Font.java:196)
> at
> org.apache.pdfbox.pdmodel.font.PDFontFactory.createFont(PDFontFactory.java:97)
> at org.apache.pdfbox.pdmodel.PDResources.getFont(PDResources.java:146)
> at
> org.apache.pdfbox.contentstream.operator.text.SetFontAndSize.process(SetFontAndSize.java:66)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processOperator(PDFStreamEngine.java:933)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processStreamOperators(PDFStreamEngine.java:515)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processStream(PDFStreamEngine.java:489)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processPage(PDFStreamEngine.java:156)
> at org.apache.pdfbox.rendering.PageDrawer.drawPage(PageDrawer.java:272)
> at org.apache.pdfbox.rendering.PDFRenderer.renderImage(PDFRenderer.java:321)
> at org.apache.pdfbox.rendering.PDFRenderer.renderImage(PDFRenderer.java:243)
> at
> org.apache.pdfbox.rendering.PDFRenderer.renderImageWithDPI(PDFRenderer.java:229)
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