Save on Fail Fails for Molecular Nodes' Testfile

[Vollkornaffe]

Something goes wrong with storing the blend file on failure for the molecular nodes' test:

packages/tree_clipper/tests/test_molecular_nodes.py:33: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

name = 'test_node_data_file'

    def save_failed(name: str):
        test_failures = Path("test_failures")
        test_failures.mkdir(exist_ok=True)
        path = str(test_failures / f"{name}.blend")
>       bpy.ops.wm.save_as_mainfile(filepath=path)
E       RuntimeError: Error: /home/lars/src/tree_clipper/packages/tree_clipper/tests/binary_blend_files/molecular_nodes/blendcache_node_append_file/sim_StorageCube_GeometryNodes/1854001160/meta is not a directory
E       Error: /home/lars/src/tree_clipper/packages/tree_clipper/tests/binary_blend_files/molecular_nodes/blendcache_node_append_file/sim_StorageCube_GeometryNodes/875041896/meta is not a directory
E       Error: /home/lars/src/tree_clipper/packages/tree_clipper/tests/binary_blend_files/molecular_nodes/blendcache_node_append_file/sim_StorageCube_GeometryNodes/520793016/meta is not a directory
E       Error: /home/lars/src/tree_clipper/packages/tree_clipper/tests/binary_blend_files/molecular_nodes/blendcache_node_append_file/sim_StorageCube_GeometryNodes/511017103/meta is not a directory

packages/tree_clipper/tests/util.py:58: RuntimeError

Most likely won't fix that one.