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https://issues.apache.org/jira/browse/PDFBOX-5786?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17827698#comment-17827698
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Tilman Hausherr commented on PDFBOX-5786:
-----------------------------------------
proposed change: add
{code:java}
if (key == null)
{
key = new COSObjectKey(++number, 0);
}
{code}
before the first occurrence of {{objectKeys.put(obj, key)}} in
{{getObjectKey()}}.
I'm not sure if that change is good, but the result file looks the same 😂
> 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
> 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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