Error when hot reloading from VS Code while a tool is active

[jlampel]

When saving any change in VS Code while working on the add-on live, even a simple UI one, and at least on Windows and with Blender 4.3 while a RF tool is active, I get the following error:

127.0.0.1 - - [06/Jan/2025 11:47:23] "GET / HTTP/1.1" 200 -
Got POST: {'type': 'reload', 'names': ['retopoflow'], 'dirs': ['c:\\Users\\jonat\\Documents\\GitHub\\retopoflow']}
127.0.0.1 - - [06/Jan/2025 11:47:24] "POST / HTTP/1.1" 200 -
RFCore_Operator.__del__!!! True
Error in bpy.app.handlers.depsgraph_update_pre[0]:
Traceback (most recent call last):
  File "C:\Users\Jonathan\AppData\Roaming\Blender Foundation\Blender\4.3\scripts\addons\screencast_keys\ops.py", line 1637, in sort_modalhandlers
    op = handler.op.contents
         ^^^^^^^^^^^^^^^^^^^
ValueError: NULL pointer access
Error in bpy.app.handlers.depsgraph_update_pre[1]:
Traceback (most recent call last):
  File "C:\Users\Jonathan\AppData\Roaming\Blender Foundation\Blender\4.3\scripts\addons\screencast_keys\ops.py", line 1528, in auto_save
    op = handler.op.contents
         ^^^^^^^^^^^^^^^^^^^
ValueError: NULL pointer access
Addon Common: use_bgl_default=False use_gpu_default=True use_gpu_scissor=True
Sending: {'type': 'addonUpdated'}

Traceback (most recent call last):
  File "C:\Users\Jonathan\AppData\Roaming\Blender Foundation\Blender\4.3\scripts\addons\retopoflow\retopoflow\rfoverlays\loopstrip_selection_overlay.py", line 79, in draw_postpixel_overlay
    is_done = (self.RFCore.selected_RFTool_idname != rftool_idname)
               ^^^^^^^^^^^
  File "C:\Program Files\Blender Foundation\Blender 4.3\4.3\scripts\modules\bpy_types.py", line 936, in __getattribute__
    properties = _StructRNA.path_resolve(self, "properties")
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
ReferenceError: StructRNA of type RFOperator_LoopStrip_Selection_Overlay has been removed
Traceback (most recent call last):
  File "C:\Users\Jonathan\AppData\Roaming\Blender Foundation\Blender\4.3\scripts\addons\retopoflow\retopoflow\rfoverlays\loopstrip_selection_overlay.py", line 79, in draw_postpixel_overlay
    is_done = (self.RFCore.selected_RFTool_idname != rftool_idname)
               ^^^^^^^^^^^
  File "C:\Program Files\Blender Foundation\Blender 4.3\4.3\scripts\modules\bpy_types.py", line 936, in __getattribute__
    properties = _StructRNA.path_resolve(self, "properties")
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
ReferenceError: StructRNA of type RFOperator_LoopStrip_Selection_Overlay has been removed