Linebreak inserted between each letter

[rezemika]

Description of the bug

Hey, thank you so much for this amazing tool!

I am using PyMuPDF to parse many official french documents, they contain a cover, a table of contents, and pages of scanned content. The vast majority of them is read with no problem, but for a small number of them, a linebreak is inserted between each letter of the content, making it almost unreadable.

Here are links to a few documents where this happens:

• https://www.loire-atlantique.gouv.fr/contenu/telechargement/57967/423894/file/RAA n°056 du 3 avril 2023.pdf
• https://www.loire-atlantique.gouv.fr/contenu/telechargement/58441/427324/file/RAA n°78 du 28 avril 2023.pdf
• https://www.loire-atlantique.gouv.fr/contenu/telechargement/58439/427314/file/RAA n°77 du 28 avril 2023.pdf

How to reproduce the bug

For instance, here is an example with the second mentioned document:

>>> import pymupdf
>>> f = "2023-04-28-ee04e9ccb016e7806a7cf92a48155834.pdf"
>>> doc = pymupdf.Document(f)
>>> doc[0].get_text("blocks")
[
    (164.6999969482422, 377.63739013671875, 436.3139953613281, 394.6753845214844, 'R\nE\nC\nU\nE\nI\nL\n \nD\nE\nS\n \nA\nC\nT\nE\nS\n \nA\nD\nMI\nN\nI\nS\nT\nR\nA\nT\nI\nF\nS\n', 0, 0),
    (225.0, 531.0374145507812, 376.00396728515625, 548.0614013671875, 'n\n°\n \n7\n7\n \nd\nu\n \n2\n8\n \na\nv\nr\ni\nl\n \n2\n0\n2\n3\n', 1, 0)
]

>>> pymupdf.version
('1.24.7', '1.24.4', '20240626000001')

And here is its first page as I see it:

Please let me know if I can provide any further information!

PS: Is there any "debugging tool" that would allow you to view text and content blocks as they're seen by PyMuPDF for easier analysis?

PyMuPDF version

1.24.7

Operating system

Linux

Python version

3.11

[JorjMcKie]

This is a MuPDF problem which I will transfer to their issue system.
test.pdf

MuPDF issue link: https://bugs.ghostscript.com/show_bug.cgi?id=707859

[julian-smith-artifex-com]

Fixed in 1.24.10.