When loading a [confidential] document (.docx), Writer crashes with:

Unspecified Application Error

Fatal exception: Signal 6
Stack:
/usr/lib/libreoffice/program/libuno_sal.so.3(+0x37722)[0x7f1c78987722]
/usr/lib/libreoffice/program/libuno_sal.so.3(+0x378fa)[0x7f1c789878fa]
/lib/x86_64-linux-gnu/libc.so.6(+0x3c050)[0x7f1c7445b050]
...
/usr/lib/libreoffice/program/soffice.bin(+0x10b1)[0x55a2f5e000b1]

The document also fails to convert to PDF using the command line:

$ soffice --convert-to pdf file.docx 
Gtk-Message: 17:39:01.845: Failed to load module "colorreload-gtk-module"
Gtk-Message: 17:39:01.846: Failed to load module "window-decorations-gtk-module"
convert /tmp/file.docx -> /tmp/file.pdf using filter : writer_pdf_Export
Unspecified Application Error

The same error occurs when using --safe-mode.

However, the --cat mode successfully prints the plain-text content of the file.

As a reference point, Okular's backend for ODT documents (Debian 12: okular-backend-odt 1:3.2.1+dfsg-6+b3) can import the document ok.

I'm not able to supply the offending document but would be happy to work through debugging it with someone. As far as I know the file isn't anything particularly exotic.

Details of system:

Debian 12 (bookworm) on Linux faramir 6.1.0-22-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.94-1 (2024-06-21) x86_64 GNU/Linux on a Intel(R) Core(TM) i5-3210M CPU @ 2.50GHz

$ dpkg -l | grep libreoffice
ii  liblibreoffice-java                                         4:7.4.7-1+deb12u3                   all          LibreOffice UNO runtime environment -- Java library
ii  liblibreofficekitgtk                                        4:7.4.7-1+deb12u3                   amd64        GTK3 widget wrapping LibreOffice functionality
ii  libreoffice-base                                            4:7.4.7-1+deb12u3                   amd64        office productivity suite -- database
ii  libreoffice-base-core                                       4:7.4.7-1+deb12u3                   amd64        office productivity suite -- shared library
ii  libreoffice-base-drivers                                    4:7.4.7-1+deb12u3                   amd64        Database connectivity drivers for LibreOffice
ii  libreoffice-calc                                            4:7.4.7-1+deb12u3                   amd64        office productivity suite -- spreadsheet
ii  libreoffice-common                                          4:7.4.7-1+deb12u3                   all          office productivity suite -- arch-independent files
ii  libreoffice-core                                            4:7.4.7-1+deb12u3                   amd64        office productivity suite -- arch-dependent files
ii  libreoffice-draw                                            4:7.4.7-1+deb12u3                   amd64        office productivity suite -- drawing
ii  libreoffice-gnome                                           4:7.4.7-1+deb12u3                   amd64        office productivity suite -- GNOME integration
ii  libreoffice-gtk3                                            4:7.4.7-1+deb12u3                   amd64        office productivity suite -- GTK+ 3 integration
ii  libreoffice-help-common                                     4:7.4.7-1+deb12u3                   all          office productivity suite -- common files for LibreOffice help
ii  libreoffice-help-en-gb                                      4:7.4.7-1+deb12u3                   all          office productivity suite -- English_british help
ii  libreoffice-help-en-us                                      4:7.4.7-1+deb12u3                   all          office productivity suite -- English_american help
ii  libreoffice-impress                                         4:7.4.7-1+deb12u3                   amd64        office productivity suite -- presentation
ii  libreoffice-java-common                                     4:7.4.7-1+deb12u3                   all          office productivity suite -- arch-independent Java support files
ii  libreoffice-l10n-en-gb                                      4:7.4.7-1+deb12u3                   all          office productivity suite -- English_british language package
ii  libreoffice-math                                            4:7.4.7-1+deb12u3                   amd64        office productivity suite -- equation editor
ii  libreoffice-sdbc-firebird                                   4:7.4.7-1+deb12u3                   amd64        Firebird SDBC driver for LibreOffice
ii  libreoffice-sdbc-hsqldb                                     4:7.4.7-1+deb12u3                   amd64        HSQLDB SDBC driver for LibreOffice
ii  libreoffice-style-breeze                                    4:7.4.7-1+deb12u3                   all          office productivity suite -- Breeze symbol style
ii  libreoffice-style-colibre                                   4:7.4.7-1+deb12u3                   all          office productivity suite -- colibre symbol style
ii  libreoffice-style-elementary                                4:7.4.7-1+deb12u3                   all          office productivity suite -- Elementary symbol style
ii  libreoffice-writer                                          4:7.4.7-1+deb12u3                   amd64        office productivity suite -- word processor
ii  libreofficekit-data                                         4:7.4.7-1+deb12u3                   all          common data for LOKDocView