a143a99634
When a object matrix has a determinant of 0 (which typically means 0s on one or more of the scale axes), the matrix inversion would become invalid thus the inversion matrix will be quietly set to diag(0). This would basically reset all vertices to the origin of the object after applying the inversion matrix. This happens in the "apply rotation" stage. Now addtional warnings will be shown to the user when there are objects that tries to go through such operation, and they will be skipped. ------- It will look like this when some objects failed, if you want to test, just scale some objects to 0 and apply rotation:  Pull Request: https://projects.blender.org/blender/blender/pulls/128273
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