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Orphaned processes every time I save resulting in my mac running out of file descriptors

See original GitHub issue

Environment data

VS Code version: 1.29.1
Extension version (available under the Extensions sidebar): 2018.11.0
OS and version: macOS Mojave 10.14.1
Python version (& distribution if applicable, e.g. Anaconda): 3.7.1 (via Homebrew)
Type of virtual environment used (N/A | venv | virtualenv | conda | …): Pipenv
Relevant/affected Python packages and their versions: n/a

Expected behaviour

I expect this plugin to run at most 1 process? Or at least kill the processes it no longer needs.

Actual behaviour

It creates a new python process everytime I edit my code. These pile up until my OS runs out of file descriptors. screenshot 2018-12-04 at 14 05 55

Steps to reproduce:

Just having this plugin on my machine produces the same results every time I edit python code.
It might be relevant to note that I’m using Pipenv?

Logs

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

(nothing...)

Output from Console under the Developer Tools panel (toggle Developer Tools on under Help)

console.ts:134 [Extension Host] Python Extension: stderr jediProxy, Error (stderr)     self._kill()

t.log @ console.ts:134
console.ts:134 [Extension Host] Python Extension: stderr jediProxy, Error (stderr)   File "/Users/sithembiso/.vscode/extensions/ms-python.python-2018.11.0/pythonFiles/jedi/evaluate/compiled/subprocess/__init__.py", line 207, in _kill

t.log @ console.ts:134
console.ts:134 [Extension Host] Python Extension: stderr jediProxy, Error (stderr)     self._process.kill()
t.log @ console.ts:134
console.ts:134 [Extension Host] Python Extension: stderr jediProxy, Error (stderr) 
  File "/Users/sithembiso/.vscode/extensions/ms-python.python-2018.11.0/pythonFiles/jedi/cache.py", line 143, in wrapper

t.log @ console.ts:134
console.ts:134 [Extension Host] Python Extension: stderr jediProxy, Error (stderr)     result = method(self, *args, **kwargs)

t.log @ console.ts:134
console.ts:134 [Extension Host] Python Extension: stderr jediProxy, Error (stderr)   File "/Users/sithembiso/.vscode/extensions/ms-python.python-2018.11.0/pythonFiles/jedi/evaluate/compiled/subprocess/__init__.py", line 177, in _process

t.log @ console.ts:134
console.ts:134 [Extension Host] Python Extension: stderr jediProxy, Error (stderr)     bufsize=-1
t.log @ console.ts:134
console.ts:134 [Extension Host] Python Extension: stderr jediProxy, Error (stderr) 
  File "/Users/sithembiso/.vscode/extensions/ms-python.python-2018.11.0/pythonFiles/jedi/_compatibility.py", line 525, in __init__

t.log @ console.ts:134
console.ts:134 [Extension Host] Python Extension: stderr jediProxy, Error (stderr)     super(GeneralizedPopen, self).__init__(*args, **kwargs)
t.log @ console.ts:134
console.ts:134 [Extension Host] Python Extension: stderr jediProxy, Error (stderr) 
  File "/usr/local/Cellar/python/3.7.1/Frameworks/Python.framework/Versions/3.7/lib/python3.7/subprocess.py", line 769, in __init__

t.log @ console.ts:134
console.ts:134 [Extension Host] Python Extension: stderr jediProxy, Error (stderr)     restore_signals, start_new_session)
t.log @ console.ts:134
console.ts:134 [Extension Host] Python Extension: stderr jediProxy, Error (stderr) 
  File "/usr/local/Cellar/python/3.7.1/Frameworks/Python.framework/Versions/3.7/lib/python3.7/subprocess.py", line 1447, in _execute_child

t.log @ console.ts:134
console.ts:134 [Extension Host] Python Extension: stderr jediProxy, Error (stderr)     restore_signals, start_new_session, preexec_fn)
t.log @ console.ts:134
console.ts:134 [Extension Host] Python Extension: stderr jediProxy, Error (stderr) 
BlockingIOError: [Errno 35] Resource temporarily unavailable

t.log @ console.ts:134
console.ts:134 [Extension Host] Python Extension: stderr jediProxy, Error (stderr) Traceback (most recent call last):
  File "/Users/sithembiso/.vscode/extensions/ms-python.python-2018.11.0/pythonFiles/jedi/cache.py", line 141, in wrapper
    return dct[key]
KeyError: ((), frozenset())

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/sithembiso/.vscode/extensions/ms-python.python-2018.11.0/pythonFiles/jedi/api/environment.py", line 74, in _get_subprocess
    info = self._subprocess._send(None, _get_info)
  File "/Users/sithembiso/.vscode/extensions/ms-python.python-2018.11.0/pythonFiles/jedi/evaluate/compiled/subprocess/__init__.py", line 229, in _send
    pickle_dump(data, self._process.stdin, self._pickle_protocol)
  File "/Users/sithembiso/.vscode/extensions/ms-python.python-2018.11.0/pythonFiles/jedi/cache.py", line 143, in wrapper
    result = method(self, *args, **kwargs)
  File "/Users/sithembiso/.vscode/extensions/ms-python.python-2018.11.0/pythonFiles/jedi/evaluate/compiled/subprocess/__init__.py", line 177, in _process
    bufsize=-1
  File "/Users/sithembiso/.vscode/extensions/ms-python.python-2018.11.0/pythonFiles/jedi/_compatibility.py", line 525, in __init__
    super(GeneralizedPopen, self).__init__(*args, **kwargs)
  File "/usr/local/Cellar/python/3.7.1/Frameworks/Python.framework/Versions/3.7/lib/python3.7/subprocess.py", line 769, in __init__
    restore_signals, start_new_session)
  File "/usr/local/Cellar/python/3.7.1/Frameworks/Python.framework/Versions/3.7/lib/python3.7/subprocess.py", line 1447, in _execute_child
    restore_signals, start_new_session, preexec_fn)
BlockingIOError: [Errno 35] Resource temporarily unavailable

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "completion.py", line 620, in watch
    response = self._process_request(rq)
  File "completion.py", line 564, in _process_request
    all_scopes=True),
  File "/Users/sithembiso/.vscode/extensions/ms-python.python-2018.11.0/pythonFiles/jedi/api/__init__.py", line 474, in names
    script = Script(source, line=1, column=0, path=path, encoding=encoding, environment=environment)
  File "/Users/sithembiso/.vscode/extensions/ms-python.python-2018.11.0/pythonFiles/jedi/api/__init__.py", line 108, in __init__
    project, environment=environment, script_path=self.path
  File "/Users/sithembiso/.vscode/extensions/ms-python.python-2018.11.0/pythonFiles/jedi/evaluate/__init__.py", line 94, in __init__
    self.compiled_subprocess = environment.get_evaluator_subprocess(self)
  File "/Users/sithembiso/.vscode/extensions/ms-python.python-2018.11.0/pythonFiles/jedi/api/environment.py", line 113, in get_evaluator_subprocess
    return EvaluatorSubprocess(evaluator, self._get_subprocess())
  File "/Users/sithembiso/.vscode/extensions/ms-python.python-2018.11.0/pythonFiles/jedi/api/environment.py", line 79, in _get_subprocess
    exc))
jedi.api.environment.InvalidPythonEnvironment: Could not get version information for '/Users/sithembiso/.local/share/virtualenvs/lepsta-6UJ54azG/bin/python': BlockingIOError(35, 'Resource temporarily unavailable')