Exception under Jedi LSP involving didChangeNotification

[brettcannon]

Environment data

• VS Code version: 1.55.0-insiders
• Extension version (available under the Extensions sidebar): 2021.4.658580515-dev
• OS and version: XXX
• Python version (& distribution if applicable, e.g. Anaconda): 3.8.2
• Type of virtual environment used (N/A | venv | virtualenv | conda | ...): venv
• Relevant/affected Python packages and their versions: N/A
• Relevant/affected Python-related VS Code extensions and their versions: N/A
• Value of the python.languageServer setting: JediLSP

[NOTE: If you suspect that your issue is related to the Microsoft Python Language Server (python.languageServer: 'Microsoft'), please download our new language server Pylance from the VS Code marketplace to see if that fixes your issue]

Expected behaviour

No errors.

Actual behaviour

Errors in Output panel (see logs below).

Steps to reproduce:

[NOTE: Self-contained, minimal reproducing code samples are extremely helpful and will expedite addressing your issue]

1. Try a completion

Logs

Output for Python in the Output panel (View→Output, change the drop-down the upper-right of the Output panel to Python)

Failed to handle request 7 textDocument/codeAction Object(textDocument=Object(uri='file:///home/brettcannon/scratch/Some%20Python%20test%20space/whatever.py'), range=Object(start=Object(line=22, character=3), end=Object(line=22, character=3)), context=Object(diagnostics=[]))
Traceback (most recent call last):
  File "/home/brettcannon/.vscode-server-insiders/extensions/ms-python.python-2021.4.658580515-dev/pythonFiles/lib/python/pygls/protocol.py", line 324, in _handle_request
    self._execute_request(msg_id, handler, params)
  File "/home/brettcannon/.vscode-server-insiders/extensions/ms-python.python-2021.4.658580515-dev/pythonFiles/lib/python/pygls/protocol.py", line 249, in _execute_request
    self._send_response(msg_id, handler(params))
  File "/home/brettcannon/.vscode-server-insiders/extensions/ms-python.python-2021.4.658580515-dev/pythonFiles/lib/python/jedi_language_server/server.py", line 448, in code_action
    extract_function_refactoring = jedi_script.extract_function(
  File "/home/brettcannon/.vscode-server-insiders/extensions/ms-python.python-2021.4.658580515-dev/pythonFiles/lib/python/jedi/api/__init__.py", line 62, in wrapper
    return func(self, *args, **kwargs)
  File "/home/brettcannon/.vscode-server-insiders/extensions/ms-python.python-2021.4.658580515-dev/pythonFiles/lib/python/jedi/api/__init__.py", line 781, in extract_function
    return self._extract_function(line, column, **kwargs)  # Python 2...
  File "/home/brettcannon/.vscode-server-insiders/extensions/ms-python.python-2021.4.658580515-dev/pythonFiles/lib/python/jedi/api/helpers.py", line 487, in wrapper
    return func(self, line, column, *args, **kwargs)
  File "/home/brettcannon/.vscode-server-insiders/extensions/ms-python.python-2021.4.658580515-dev/pythonFiles/lib/python/jedi/api/__init__.py", line 793, in _extract_function
    return extract_function(
  File "/home/brettcannon/.vscode-server-insiders/extensions/ms-python.python-2021.4.658580515-dev/pythonFiles/lib/python/jedi/api/refactoring/extract.py", line 244, in extract_function
    first, second = _split_prefix_at(after_leaf, until_pos[0])
  File "/home/brettcannon/.vscode-server-insiders/extensions/ms-python.python-2021.4.658580515-dev/pythonFiles/lib/python/jedi/api/refactoring/extract.py", line 148, in _split_prefix_at
    second_line_count = leaf.start_pos[0] - until_line
AttributeError: 'NoneType' object has no attribute 'start_pos'
[Error - 12:07:12 PM] Request textDocument/codeAction failed.
  Message: AttributeError: 'NoneType' object has no attribute 'start_pos'
  Code: -32602 
{'traceback': ['  File "/home/brettcannon/.vscode-server-insiders/extensions/ms-python.python-2021.4.658580515-dev/pythonFiles/lib/python/pygls/protocol.py", line 324, in _handle_request\n    self._execute_request(msg_id, handler, params)\n', '  File "/home/brettcannon/.vscode-server-insiders/extensions/ms-python.python-2021.4.658580515-dev/pythonFiles/lib/python/pygls/protocol.py", line 249, in _execute_request\n    self._send_response(msg_id, handler(params))\n', '  File "/home/brettcannon/.vscode-server-insiders/extensions/ms-python.python-2021.4.658580515-dev/pythonFiles/lib/python/jedi_language_server/server.py", line 448, in code_action\n    extract_function_refactoring = jedi_script.extract_function(\n', '  File "/home/brettcannon/.vscode-server-insiders/extensions/ms-python.python-2021.4.658580515-dev/pythonFiles/lib/python/jedi/api/__init__.py", line 62, in wrapper\n    return func(self, *args, **kwargs)\n', '  File "/home/brettcannon/.vscode-server-insiders/extensions/ms-python.python-2021.4.658580515-dev/pythonFiles/lib/python/jedi/api/__init__.py", line 781, in extract_function\n    return self._extract_function(line, column, **kwargs)  # Python 2...\n', '  File "/home/brettcannon/.vscode-server-insiders/extensions/ms-python.python-2021.4.658580515-dev/pythonFiles/lib/python/jedi/api/helpers.py", line 487, in wrapper\n    return func(self, line, column, *args, **kwargs)\n', '  File "/home/brettcannon/.vscode-server-insiders/extensions/ms-python.python-2021.4.658580515-dev/pythonFiles/lib/python/jedi/api/__init__.py", line 793, in _extract_function\n    return extract_function(\n', '  File "/home/brettcannon/.vscode-server-insiders/extensions/ms-python.python-2021.4.658580515-dev/pythonFiles/lib/python/jedi/api/refactoring/extract.py", line 244, in extract_function\n    first, second = _split_prefix_at(after_leaf, until_pos[0])\n', '  File "/home/brettcannon/.vscode-server-insiders/extensions/ms-python.python-2021.4.658580515-dev/pythonFiles/lib/python/jedi/api/refactoring/extract.py", line 148, in _split_prefix_at\n    second_line_count = leaf.start_pos[0] - until_line\n']}

[karthiknadig]

This should be filed on jedi_language_server.