Undo Clears Slide

[Lazaro10e0]

Describe the bug
Sometimes when I do Ctrl+Z it clears the whole slide.

To Reproduce
I don't know when it happens, just that sometimes the Undo works fine and sometimes it clears the whole slide...

Expected behavior
Only one undo.

Environment (please complete the following information):

• OS: W10
• Python version: Python 3.10.11
• Pympress version: 1.8.3b
• Installation method: MSI file

[Cimbali]

Is there anything in the log file? It should be in %LOCALAPPDATA%\pympress.log (usually C:\Users\<username>\AppData\pympress.log)

[Lazaro10e0]

undo_clears_slide.txt
I attach the log file.
Is the last thing that happened. It happened, I closed the app and got the log.

[Cimbali]

Thanks! This is the bit corresponding to the last execution:

INFO:pympress.app:Pympress: 1.8.3b ; Python: 3.10.11 ; OS: Windows 10 10.0.19045 ; Gtk 3.24.38 ; GLib 2.76.1 ; Poppler 23.03.0 cairo ; Cairo 1.17.8 , pycairo 1.23.0
INFO:pympress.extras:Media support: GdkPixbuf gif player, GStreamer not available, VLC not available
WARNING:pympress.ui:Gtk.Application.inhibit failed preventing screensaver, trying hard disabling
CRITICAL:__main__:Uncaught exception:
Traceback (most recent call last):
  File "D:/a/pympress/pympress/pympress/app.py", line 242, in do_shutdown
  File "D:/a/pympress/pympress/pympress/ui.py", line 727, in cleanup
  File "D:/a/pympress/pympress/pympress/scribble.py", line 775, in disable_scribbling
AttributeError: 'NoneType' object has no attribute 'set_event_compression'

Unfortunately the error reported is during the exit -- there is no error message from the undo.

[Cimbali]

Can you click undo further? What happens if you try to redo?