MuPDF error: format error: negative code in 1d faxd

[uwohlfeil]

Description of the bug

Dear PyMuPdf team,

we have found a PDF file that generates an error when I try to convert its pages to an image.
I have also tested the javascript variant of this library (mupdf.js) which produces the same error.

I test this document with other tools like Ghostscript, ImageMagik or pdftoppm and also PDF viewers like pdf.js.
All of them were able to render this PDF without any errors.

Can you please investigate this problem?

I attached the document here:
Testdokument-Scan-bw-OCR.pdf

How to reproduce the bug

import pymupdf

doc=pymupdf.open("Testdokument-Scan-bw-OCR.pdf")

for p in doc.pages():
pix = p.get_pixmap(dpi=150)
pix.save("t-%s.png" % p.number)
pix = None
doc.close()

PyMuPDF version

1.25.1

Operating system

Linux

Python version

3.12

[JorjMcKie]

This is an upstream error. I am going to file an issue in MuPDF's system and insert a link here.

[JorjMcKie]

MuPDF issue link: https://bugs.ghostscript.com/show_bug.cgi?id=708254

[uwohlfeil]

I also checked the following versions:

• 1.24.14 same error
• 1.23.26 No direct error message, but the result is a black png with a small white line on the top
• 1.22.5 No direct error message, but the result is a black png with a small white line on the top
• 1.21.1 No direct error message, but the result is a black png with a small white line on the top