`+` has a higher precedence than `or`, so it resulted in the error below
```
Traceback (most recent call last):
File "\bonsai\bim\module\spatial\prop.py", line 86, in update_active_container_index
tool.Spatial.load_contained_elements()
File "\bonsai\tool\spatial.py", line 312, in load_contained_elements
cls.load_contained_elements_by_type(container)
File "\bonsai\tool\spatial.py", line 321, in load_contained_elements_by_type
results = cls.get_container_elements_grouped_by_type(container)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "\bonsai\tool\spatial.py", line 294, in get_container_elements_grouped_by_type
element_type.is_a() + "/" + element_type.Name or "Unnamed"
~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~
TypeError: can only concatenate str (not "NoneType") to str
```
There seems to be cases when Blender might crash too unexpectedly.
E.g. #6686 - during viewport render system is running out of resources and crashing without leaving blender.crash.txt, leaving everyone clueless. Which is arguably a bug in Blender (both crash and lack of any crash report), but at least we'll have a fallback for this case.
What bonsai.crash.txt does - it's created in system temp folder with the current Python traceback, just before some dangerous operation. If operation didn't crashed Blender, then file will be unlinked. If crash did occurred, it might be the only clue for users and devs on what actually happened.
Otherwise it was trying to load drawing styles too early, when drawing was not yet active. And then they were reloaded again during ActivateDrawingBase. Occurred after c2860e6, before this commit issue was kind of hidden.
Possibly occurred after 4c255cc, but haven't investigated deeper.
@BIMvoice
The error you were reporting about Split Along Edge operator was caused by this issue, should be fixed now too.
See https://jmp.sh/hgJEHsgH
Example error traceback:
```
Error: Python: Traceback (most recent call last):
File "C\bonsai\bim\ifc.py", line 487, in execute_ifc_operator
result = getattr(operator, "_execute")(context)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C\bonsai\bim\module\geometry\operator.py", line 541, in _execute
self.update_obj_mesh_representation(context, obj)
File "C\bonsai\bim\module\geometry\operator.py", line 666, in update_obj_mesh_representation
tool.Ifc.link(new_representation, data)
File "C\bonsai\tool\ifc.py", line 230, in link
IfcStore.link_element(element, obj)
File "C\bonsai\bim\ifc.py", line 258, in link_element
tool.Geometry.get_mesh_props(obj).ifc_definition_id = element.id()
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C\bonsai\tool\geometry.py", line 92, in get_mesh_props
return mesh.BIMMeshProperties
^^^^^^^^^^^^^^^^^^^^^^
ReferenceError: StructRNA of type Mesh has been removed
```
It was deprecated a while ago in 43869c3, when we stopped using curves for text annotations. bim.resize_text was also using curve annotations and now also was unused
Not that skipping non-string properties was a bad idea, but inserting it right at the beginning was - non-string IFC properties were missing IFC descriptions because of it. Moved it past `Attribute` check to avoid this issue.
For anyone hearing about this feature for the first time - https://imgur.com/a/dNRao3R
I assume this was also the issue that was encountered in #5892
Andrej730
