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https://issues.apache.org/jira/browse/PDFBOX-6142?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18050637#comment-18050637
]
Tilman Hausherr edited comment on PDFBOX-6142 at 1/8/26 2:56 PM:
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[~lehmi] it's DirectAccessByteArrayOutputStream in COSWriterObjectStream.java
from PDFBOX-5169. The length of "buf" isn't same as the length of the data. To
prove this, I replaced the code:
{code:java}
@Override
public byte[] toByteArray()
{
//return buf;
System.out.println(buf.length + " " + this.size());
byte[] ba = super.toByteArray();
return ba;
}
{code}
and got output like this:
128 69
128 69
128 69
128 69
128 75
256 131
128 75
128 75
128 75
32 5
128 75
128 75
128 75
128 75
128 75
128 75
128 75
128 75
128 75
128 75
256 174
64 45
4096 3224
The real mystery here is why the result file is still readable by PDFBox, and
how would a test have to be that detects such a problem?
was (Author: tilman):
[~lehmi] it's DirectAccessByteArrayOutputStream in COSWriterObjectStream.java
from PDFBOX-5169. The length of "buf" isn't same as the length of the data. To
prove this, I replaced the code:
{code:java}
@Override
public byte[] toByteArray()
{
//return buf;
System.out.println(buf.length + " " + this.size());
byte[] ba = super.toByteArray();
return ba;
}
{code}
and got output like this:
128 69
128 69
128 69
128 69
128 75
256 131
128 75
128 75
128 75
32 5
128 75
128 75
128 75
128 75
128 75
128 75
128 75
128 75
128 75
128 75
256 174
64 45
4096 3224
The real mystery here is why the result file is still readable by PDFBox.
> New release will produce incorrect files.
> -----------------------------------------
>
> Key: PDFBOX-6142
> URL: https://issues.apache.org/jira/browse/PDFBOX-6142
> Project: PDFBox
> Issue Type: Bug
> Reporter: Daniel Persson
> Priority: Critical
> Attachments: after.pdf, before.pdf
>
>
> After just running load and save of a file I get multiple syntax errors in
> the result. No errors in the original.
>
>
> {code:java}
> PDDocument doc = Loader.loadPDF(new File("before.pdf"));
> doc.save(new File("after.pdf")); {code}
>
>
> When I have run this code I will then render the PDF with Poppler
>
> {code:java}
> pdftoppm version 25.08.0
> Copyright 2005-2025 The Poppler Developers - http://poppler.freedesktop.org
> Copyright 1996-2011, 2022 Glyph & Cog, LLC
> {code}
>
>
> Running this command
>
> {code:java}
> pdftoppm -png after.pdf after {code}
>
>
> Will generate a lot off Syntax errors
> Syntax Error: Unterminated string
> Syntax Error: End of file inside dictionary
> Syntax Error (4124140): Illegal character ')'
> Syntax Error: End of file inside dictionary
> Syntax Error: End of file inside dictionary
> Syntax Error: End of file inside dictionary
> Syntax Error: End of file inside dictionary
> Syntax Error: End of file inside array
> Syntax Error: End of file inside dictionary
> Syntax Error: End of file inside array
> Syntax Error: End of file inside dictionary
> Syntax Error: End of file inside array
> Syntax Error: End of file inside dictionary
> Syntax Error: Dictionary key must be a name object
> Syntax Error: End of file inside dictionary
> Syntax Error: End of file inside dictionary
> Syntax Error: End of file inside dictionary
> Syntax Error: End of file inside array
> Syntax Error: End of file inside dictionary
> Syntax Error: End of file inside array
> Syntax Error: End of file inside dictionary
> Syntax Error: End of file inside array
> Syntax Error: End of file inside dictionary
> Syntax Error: End of file inside array
> Syntax Error: End of file inside dictionary
> Syntax Error: End of file inside array
> Syntax Error: End of file inside dictionary
> Syntax Error: End of file inside dictionary
> Syntax Error: Unterminated hex string
> Syntax Error (4127569): Illegal character <2f> in hex string
> Syntax Error (4127569): Illegal character <73> in hex string
> Syntax Error (4127569): Illegal character <6f> in hex string
> Syntax Error (4127569): Illegal character <6e> in hex string
> Syntax Error (4127569): Illegal character <74> in hex string
> Syntax Error (4127569): Illegal character <2f> in hex string
> Syntax Error (4127570): Illegal character <52> in hex string
> Syntax Error (4127571): Illegal character <4b> in hex string
> Syntax Error (4127572): Illegal character <47> in hex string
> Syntax Error (4127573): Illegal character <4e> in hex string
> Syntax Error (4127574): Illegal character <4f> in hex string
> Syntax Error (4127575): Illegal character <51> in hex string
> Syntax Error (4127577): Illegal character <2b> in hex string
> Syntax Error (4127577): Illegal character <47> in hex string
> Syntax Error (4127577): Illegal character <69> in hex string
> Syntax Error (4127577): Illegal character <6c> in hex string
> Syntax Error (4127577): Illegal character <6c> in hex string
> Syntax Error (4127577): Illegal character <53> in hex string
> Syntax Error (4127577): Illegal character <6e> in hex string
> Syntax Error (4127577): Illegal character <73> in hex string
> Syntax Error (4127580): Illegal character <2f> in hex string
> Syntax Error (4127580): Illegal character <6e> in hex string
> Syntax Error (4127580): Illegal character <6f> in hex string
> Syntax Error (4127580): Illegal character <69> in hex string
> Syntax Error (4127580): Illegal character <6e> in hex string
> Syntax Error (4127580): Illegal character <67> in hex string
> Syntax Error (4127580): Illegal character <2f> in hex string
> Syntax Error (4127580): Illegal character <57> in hex string
> Syntax Error (4127580): Illegal character <69> in hex string
> Syntax Error (4127580): Illegal character <6e> in hex string
> Syntax Error (4127580): Illegal character <6e> in hex string
> Syntax Error (4127580): Illegal character <73> in hex string
> Syntax Error (4127580): Illegal character <69> in hex string
> Syntax Error (4127580): Illegal character <6e> in hex string
> Syntax Error (4127580): Illegal character <6f> in hex string
> Syntax Error (4127580): Illegal character <69> in hex string
> Syntax Error (4127580): Illegal character <6e> in hex string
> Syntax Error: Unterminated hex string
> Syntax Error: End of file inside dictionary
> Syntax Error: End of file inside array
> Syntax Error: End of file inside dictionary
> Syntax Error: End of file inside dictionary
> Syntax Error: End of file inside dictionary
> Syntax Error: End of file inside array
> Syntax Error: End of file inside dictionary
> Syntax Error: End of file inside array
> Syntax Error: End of file inside dictionary
> Syntax Error: End of file inside dictionary
> Syntax Error: End of file inside dictionary
> Syntax Error: End of file inside array
> Syntax Error: End of file inside dictionary
> Syntax Error: Unterminated hex string
> Syntax Error (4128664): Illegal character <2f> in hex string
> Syntax Error (4128664): Illegal character <4d> in hex string
> Syntax Error (4128664): Illegal character <74> in hex string
> Syntax Error (4128664): Illegal character <74> in hex string
> Syntax Error (4128667): Illegal character <52> in hex string
> Syntax Error (4128667): Illegal character <2f> in hex string
> Syntax Error (4128667): Illegal character <53> in hex string
> Syntax Error (4128667): Illegal character <75> in hex string
> Syntax Error (4128667): Illegal character <74> in hex string
> Syntax Error (4128667): Illegal character <79> in hex string
> Syntax Error (4128667): Illegal character <70> in hex string
> Syntax Error (4128667): Illegal character <2f> in hex string
> Syntax Error (4128667): Illegal character <58> in hex string
> Syntax Error (4128667): Illegal character <4d> in hex string
> Syntax Error (4128667): Illegal character <4c> in hex string
> Syntax Error (4128667): Illegal character <2f> in hex string
> Syntax Error (4128667): Illegal character <54> in hex string
> Syntax Error (4128667): Illegal character <79> in hex string
> Syntax Error (4128667): Illegal character <70> in hex string
> Syntax Error (4128667): Illegal character <2f> in hex string
> Syntax Error (4128667): Illegal character <4d> in hex string
> Syntax Error (4128667): Illegal character <74> in hex string
> Syntax Error (4128667): Illegal character <74> in hex string
> Syntax Error (4128667): Illegal character '>'
> Syntax Error: End of file inside array
> Syntax Error: End of file inside dictionary
> Syntax Error: End of file inside dictionary
> Syntax Error: End of file inside array
> Syntax Error: End of file inside dictionary
> Syntax Error: End of file inside array
> Syntax Error: End of file inside dictionary
> Syntax Error: Unterminated string
> Syntax Error: End of file inside dictionary
> Syntax Error (4130539): Illegal character ')'
> Syntax Error: End of file inside dictionary
> Syntax Error: Unterminated string
> Syntax Error: End of file inside dictionary
> Syntax Error: Unterminated string
> Syntax Error: End of file inside dictionary
> Syntax Error: Kid object (page 1) is wrong type (integer)
>
> Test is running on the last commit on the 3.0 branch.
> commit 41fbf05f7b470a92ca396f5253896a3d9d253e11 (HEAD -> 3.0, upstream/3.0)
>
>
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