Description of problem:

When I have two graphical objects, for example a rectangle and a circle, and I selcct both of them and click Path -> Union, they merge into one. This is fine.
Then, when I hit CTRL-Z to Undo, Inkscape crashes.

Unfortunately, it does not say why.

Version-Release number of selected component (if applicable):

Inkscape 0.92.4

How reproducible:

Always

Steps to Reproduce:
1. Draw rectangle.
2. Draw circle.
3. Move circle over the rectangle.
4. Select both objects.
5. Click PATH - UNION.
6. Try to undo (via menu or a shortcut)

Actual results:

Inkscape crashes during the UNDO operation.

Expected results:

Inkscape should not crash.


Additional info: