Description:
Writer crashes when centering text box contents in an ODT file.

Steps to Reproduce:
Using the attached files:
1. Open the ODT file
2. Select anything into the text box
3. Try to center the text inside the text box.

Alternatively, just create a new file yourself and insert a text box, put some text in it and try to center that text.

Actual Results:
Writer crashes every time. The text inside the text box is not centered.

Expected Results:
Text is centered inside the text box.


Reproducible: Always


User Profile Reset: No



Additional Info:
Interestingly, this happens with the ODT file, but it does not happen with the DOCX file. The latter is simple the same file, "saved as" DOCX with Libreoffice.

Version: 6.4.0.3
Build ID: libreoffice-6.4.0.3-snap1
CPU threads: 4; OS: Linux 5.3; UI render: default; VCL: gtk3; 
Locale: en-US (en_US.UTF-8); UI-Language: en-US
Calc: threaded