Exception on calling ctypes callback function

When using the plugin, I'm getting this error most of the time (I'm not quite sure what the condition is):

[ScriptingProvider] Exception ignored on calling ctypes callback function <function _ThreadActionContext.__init__.<locals>.<lambda> at 0x7f73a5efcfe0>:
[ScriptingProvider] Traceback (most recent call last):
[ScriptingProvider]   File "/home/whitequark/Applications/binaryninja/plugins/../python/binaryninja/scriptingprovider.py", line 70, in <lambda>
[ScriptingProvider]     self.callback = ctypes.CFUNCTYPE(None, ctypes.c_void_p)(lambda ctxt: self.execute())
[ScriptingProvider]   File "/home/whitequark/Applications/binaryninja/plugins/../python/binaryninja/scriptingprovider.py", line 78, in execute
[ScriptingProvider]     self.func()
[ScriptingProvider]   File "/home/whitequark/.binaryninja/repositories/official/plugins/Vector35_blobextractor/sidebar.py", line 347, in <lambda>
[ScriptingProvider]     execute_on_main_thread(lambda: self._handleExtractResults(fileReports, tempDir))
[ScriptingProvider]   File "/home/whitequark/.binaryninja/repositories/official/plugins/Vector35_blobextractor/sidebar.py", line 294, in _handleExtractResults
[ScriptingProvider]     self.filesTreeModel.removeRows(0, self.filesTreeModel.rowCount())
[ScriptingProvider] RuntimeError: Internal C++ object (TreeModel) already deleted.

I'm using BN version 5.0.7265-dev Ultimate (bc6ea9d2) on Debian trixie amd64. I can't seem to easily reproduce the conditions which causes this, but it's probably related to navigating away from the blob extractor sidebar while an extraction is running.

Start with python/binaryninja/scriptingprovider.py around the ctypes callback and plugins/Vector35_blobextractor/sidebar.py around _handleExtractResults and execute_on_main_thread. Try extracting while navigating away from the blob extractor sidebar, then inspect how the deleted TreeModel is handled. Done means the reported callback exception no longer occurs in that scenario.