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https://issues.apache.org/jira/browse/PDFBOX-5786?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17832257#comment-17832257
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ASF subversion and git services commented on PDFBOX-5786:
---------------------------------------------------------
Commit 1916638 from le...@apache.org in branch 'pdfbox/trunk'
[ https://svn.apache.org/r1916638 ]
PDFBOX-5786: transfer xref-table from a brute force search to the COSDocument
to avoid double usage of COSObjectkeys
> NPE in COSWriter.getObjectKey() when saving broken file
> -------------------------------------------------------
>
> Key: PDFBOX-5786
> URL: https://issues.apache.org/jira/browse/PDFBOX-5786
> Project: PDFBox
> Issue Type: Bug
> Components: Writing
> Affects Versions: 3.0.1 PDFBox, 4.0.0
> Reporter: Tilman Hausherr
> Assignee: Andreas Lehmkühler
> Priority: Major
>
> This happens with the broken file from PDFBOX-5782 when this code is run:
> {code:java}
> PDDocument doc = Loader.loadPDF(new File("PDFBOX-5782.pdf"));
> PDFRenderer r = new PDFRenderer(doc);
> r.renderImage(0);
> doc.save(OutputStream.nullOutputStream());
> {code}
> {noformat}
> Exception in thread "main" java.lang.NullPointerException
> at java.base/java.util.Hashtable.put(Hashtable.java:475)
> at
> org.apache.pdfbox.pdfwriter.COSWriter.getObjectKey(COSWriter.java:1082)
> at
> org.apache.pdfbox.pdfwriter.COSWriter.writeReference(COSWriter.java:1391)
> at
> org.apache.pdfbox.pdfwriter.COSWriter.visitFromDictionary(COSWriter.java:1231)
> at
> org.apache.pdfbox.pdfwriter.COSWriter.writeDictionary(COSWriter.java:1179)
> at
> org.apache.pdfbox.pdfwriter.COSWriter.visitFromDictionary(COSWriter.java:1226)
> at
> org.apache.pdfbox.pdfwriter.COSWriter.writeDictionary(COSWriter.java:1179)
> at
> org.apache.pdfbox.pdfwriter.COSWriter.visitFromDictionary(COSWriter.java:1226)
> at
> org.apache.pdfbox.pdfwriter.COSWriter.visitFromStream(COSWriter.java:1413)
> at org.apache.pdfbox.cos.COSStream.accept(COSStream.java:381)
> at
> org.apache.pdfbox.pdfwriter.COSWriter.doWriteObject(COSWriter.java:606)
> at
> org.apache.pdfbox.pdfwriter.COSWriter.doWriteBodyCompressed(COSWriter.java:492)
> at
> org.apache.pdfbox.pdfwriter.COSWriter.visitFromDocument(COSWriter.java:1319)
> at org.apache.pdfbox.cos.COSDocument.accept(COSDocument.java:429)
> at org.apache.pdfbox.pdfwriter.COSWriter.write(COSWriter.java:1593)
> at org.apache.pdfbox.pdfwriter.COSWriter.write(COSWriter.java:1469)
> at org.apache.pdfbox.pdmodel.PDDocument.save(PDDocument.java:1044)
> at org.apache.pdfbox.pdmodel.PDDocument.save(PDDocument.java:968)
> {noformat}
> It does not happen if {{r.renderImage(0);}} is removed.
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