Tilman Hausherr created PDFBOX-5786:
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Summary: 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
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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