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PyMuPDF hangs when iterating over zero page PDF pages backwards #4018

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C-Saunders opened this issue Nov 4, 2024 · 2 comments
Closed

PyMuPDF hangs when iterating over zero page PDF pages backwards #4018

C-Saunders opened this issue Nov 4, 2024 · 2 comments
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bug fix developed release schedule to be determined Fixed in next release

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@C-Saunders
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Description of the bug

PyMuPDF is able to open this PDF, but hangs if I try to iterate over the pages backwards.

How to reproduce the bug

zero_pages.pdf

import pymupdf

pdf = pymupdf.open("...zero_pages.pdf")

# this raises ValueError: bad start page number
for page in pdf.pages():
    print(page.number)

# this hangs forever
for page in pdf.pages(-1, -1):
    print(page.number)

I've tried this on Mac and Linux, and with PyMuPDF versions 1.24.9 and 1.24.13

PyMuPDF version

1.24.13

Operating system

MacOS

Python version

3.11
@C-Saunders C-Saunders changed the title PyMuPDF hangs when iterating over zero page PDFs backwards PyMuPDF hangs when iterating over zero page PDF pages backwards Nov 4, 2024
@JorjMcKie JorjMcKie mentioned this issue Nov 4, 2024
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@JorjMcKie JorjMcKie added bug fix developed release schedule to be determined labels Nov 4, 2024
@JorjMcKie
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Trivial change fixes this.

@julian-smith-artifex-com
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Fixed in PyMuPDF-1.24.14.

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@C-Saunders @JorjMcKie @julian-smith-artifex-com