Missing line feed(s) in PDF in text block

[caerulescens]

Please provide all mandatory information!

Describe the bug (mandatory)

When placing redact annotations on the attached document, it seems there's a LF discarded during apply_redactions. This causes text that should span multiple lines to be written on one line.

To Reproduce (mandatory)

Place a redaction annotation anywhere on the document and finalize with Page.apply_redactions().

# give me a few minutes to verify the code 

Expected behavior (optional)

There shouldn't be overlapping text.

Screenshots (optional)

Your configuration (mandatory)

• Operating system: debian 10
• Python version: 3.8
• PyMuPDF version: 1.18.16 from pip

Problem document:
textbox_linefeed_glitch.pdf

[JorjMcKie]

This is an upstream bug (MuPDF) unfortunately.
They have fixed it in their development version, but that is unreleased yet.

[caerulescens]

That's what I assumed; I thought I'd report it anyhow. Thank you so much for your help!

[JorjMcKie]

Because there is no wy for me to help you, I am putting this issue on the pile in Discussions ☹️