e9333c82ab
Remove call to BM_elem_attrs_copy in face interpolation function. This was copying custom-data which cleared the faces CD_BM_ELEM_PYPTR, making the Python objects behave as if it was removed. While the issue could also be fixed by skipping the PYPTR layer, copying attributes such as the material & normal in a face-data interpolation function isn't correct. In cases where this is needed, it's better the caller handles copying attributes.
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