Multiple Extruder crash on OS12.6

[ryantollefson]

Description of the bug

PrusaSlicer crashes pretty consistently on me doing the following:

• Printer Settings -> Capabilities -> Set Extruders to 3 & check the box for Single Extruder Multi Material
• Plater -> Set a different filament for each of the extruders
• Import an STL object
• Place the object on a new face
• Split the object into parts (in this case there are 6 parts)
• Assign different extruders to the different parts

At some point when assigning extruders, slicing, then changing extruders & re-slicing, Slic3r will crash:

Project file & How to reproduce

If I start changing the Extruder used for each of the parts, slice, and change extruder again, it will crash (within a few minutes of repeating this).

pre-crash.3mf.zip

Checklist of files included above

• Project file
• Screenshot

Version of PrusaSlicer

2.5.0

Operating system

macOS 12.6

Printer model

MK3S+

[kubispe1]

Thanks, It is duplicate of #8837 and #8844 . I am closing it.