i produced an interessting Error today:
I was in the Add Point-Tool (Auto-Weld, Auto-Fill, Auto-Stroke, Sharp Corners - All settings enabled) and was click-dragging to create a new line, while at the same time pressing Cmd+Z to undo the Point i did before, while still holding the Left Mouse Button Pressed. This resulted in the Colsole popping up and spitting out the error-message
over and over.M_Mesh:Point - out of range
...Contents/Ressources/Support/scripts/tool/lm_add_point.lua:319: attempt to index a nil value
i had to quit and restart Moho to continue working.
I was able to reproduce this error in a new Project with the same settings.