Summary

LibreOffice 25.8.0.4 crashes when opening .docx file (regression from 25.2.5)

Description

After updating LibreOffice on LMDE 6 (Flatpak build) from version 25.2.5.2 to 25.8.0.4, LibreOffice Writer consistently crashes when attempting to open certain .docx files.

The same .docx files open normally in 25.2.5.2, so this appears to be a regression introduced in 25.8.

Steps to Reproduce

Install LibreOffice Flatpak on LMDE 6.

Launch LibreOffice Writer.

Attempt to open an attached .docx file (or any similar .docx).

Actual Result

LibreOffice crashes immediately after attempting to load the .docx file.

Expected Result

The .docx file should open normally as it does in LibreOffice 25.2.5.2.

Additional Information

Working version:

Version: 25.2.5.2 (X86_64) / LibreOffice Community
Build ID: 03d19516eb2e1dd5d4ccd751a0d6f35f35e08022
CPU threads: 3; OS: Linux 6.1; UI render: default; VCL: gtk3
Locale: en-AU (en_AU.UTF-8); UI: en-US
Flatpak
Calc: threaded


Crashing version:

Version: 25.8.0.4 (X86_64) / LibreOffice Community
Build ID: 48f00303701489684e67c38c28aff00cd5929e67
CPU threads: 3; OS: Linux 6.1; UI render: default; VCL: gtk3
Locale: en-AU (en_AU.UTF-8); UI: en-US
Flatpak
Calc: threaded


OS: LMDE 6 (based on Debian 12)

UI backend: gtk3

Package source: Flatpak

Notes

The issue is reproducible across different .docx files (not just one).

The release notes for 25.8 mention multiple .doc/.docx related changes, suggesting a regression in this area.


Component: Writer
Severity: major