vscode-python: Spawn for running test discovery is not following symlinks properly.

Environment data

• VS Code version: 1.41.1 26076a4de974ead31f97692a0d32f90d735645c0
• Extension version (available under the Extensions sidebar): 2019.11.50794
• OS and version: Fedora Linux 31
• Python version (& distribution if applicable, e.g. Anaconda): 3.7.5
• Type of virtual environment used (N/A | venv | virtualenv | conda | …): N/A
• Relevant/affected Python packages and their versions: Python 3.7.5, pytest-4.6.7, py-1.8.0, pluggy-0.12.0
• Jedi or Language Server? (i.e. what is "python.jediEnabled" set to; more info #3977): “python.jediEnabled”: true

Expected behaviour

tests are detected

Actual behaviour

tests are not detected, error is issues, running the adapter returns:

$ python /home/jp/.vscode/extensions/ms-python.python-2019.11.50794/pythonFiles/testing_tools/run_adapter.py discover pytest -- --rootdir /home/jp/py/vscode -s --cache-clear
[{"rootid": ".", "root": "/home/jp/py/vscode", "parents": [{"id": "./test_simple.py", "kind": "file", "name": "test_simple.py", "parentid": ".", "relpath": "./test_simple.py"}], "tests": [{"id": "./test_simple.py::test_simple", "name": "test_simple", "source": "./test_simple.py:1", "markers": [], "parentid": "./test_simple.py"}]}]

Steps to reproduce:

1. Create minimal repo with:

$ cat test_simple.py 
def test_simple():
    assert 2 + 2 == 4
$ cat .vscode/settings.json 
{
    "python.testing.unittestEnabled": false,
    "python.testing.nosetestsEnabled": false,
    "python.testing.pytestEnabled": true
}

1. run:

code .

1. open test_simple.py and click Discover Tests

Logs

python /home/jp/.vscode/extensions/ms-python.python-2019.11.50794/pythonFiles/testing_tools/run_adapter.py discover pytest -- --rootdir /home/jp/py/vscode -s --cache-clear
Test Discovery failed: 
TypeError: Cannot read property 'uri' of undefined

Output from Console under the Developer Tools panel (toggle Developer Tools on under Help; turn on source maps to make any tracebacks be useful by running Enable source map support for extension debugging)

console.ts:137 [Extension Host] Info Python Extension: 2019-12-31 20:05:49: Cached data exists ActivatedEnvironmentVariables, /home/jp/py/vscode
console.ts:137 [Extension Host] Info Python Extension: 2019-12-31 20:05:49: getActivatedEnvironmentVariables, Class name = b, completed in 1ms, Arg 1: <Uri:/home/jp/py/vscode>, Arg 2: undefined, Arg 3: false
console.ts:137 [Extension Host] Info Python Extension: 2019-12-31 20:05:49: Cached data exists getEnvironmentVariables, /home/jp/py/vscode
console.ts:137 [Extension Host] Info Python Extension: 2019-12-31 20:05:49: > /usr/bin/python ~/.vscode/extensions/ms-python.python-2019.11.50794/pythonFiles/testing_tools/run_adapter.py discover pytest -- --rootdir ~/py/vscode -s --cache-clear
console.ts:137 [Extension Host] Info Python Extension: 2019-12-31 20:05:49: cwd: ~/python-etl/base-code
console.ts:137 [Extension Host] Info Python Extension: 2019-12-31 20:05:49: > /usr/bin/python ~/.vscode/extensions/ms-python.python-2019.11.50794/pythonFiles/testing_tools/run_adapter.py discover pytest -- --rootdir ~/py/vscode -s --cache-clear
console.ts:137 [Extension Host] Info Python Extension: 2019-12-31 20:05:49: cwd: ~/python-etl/base-code
notificationsAlerts.ts:40 Test discovery error, please check the configuration settings for the tests.
onDidNotificationChange @ notificationsAlerts.ts:40
(anonymous) @ notificationsAlerts.ts:26
fire @ event.ts:581
addNotification @ notifications.ts:171
notify @ notificationService.ts:101
(anonymous) @ mainThreadMessageService.ts:83
_showMessage @ mainThreadMessageService.ts:44
$showMessage @ mainThreadMessageService.ts:38
_doInvokeHandler @ rpcProtocol.ts:398
_invokeHandler @ rpcProtocol.ts:383
_receiveRequest @ rpcProtocol.ts:299
_receiveOneMessage @ rpcProtocol.ts:226
(anonymous) @ rpcProtocol.ts:101
fire @ event.ts:581
fire @ ipc.net.ts:453
_receiveMessage @ ipc.net.ts:733
(anonymous) @ ipc.net.ts:592
fire @ event.ts:581
acceptChunk @ ipc.net.ts:239
(anonymous) @ ipc.net.ts:200
t @ ipc.net.ts:28
emit @ events.js:200
addChunk @ _stream_readable.js:294
readableAddChunk @ _stream_readable.js:275
Readable.push @ _stream_readable.js:210
onStreamRead @ internal/stream_base_commons.js:166
console.ts:137 [Extension Host] Error Python Extension: 2019-12-31 20:05:50: Python Extension: displayDiscoverStatus [TypeError: Cannot read property 'uri' of undefined	at /home/jp/.vscode/extensions/ms-python.python-2019.11.50794/out/client/extension.js:1:475432]
t.log @ console.ts:137
$logExtensionHostMessage @ mainThreadConsole.ts:39
_doInvokeHandler @ rpcProtocol.ts:398
_invokeHandler @ rpcProtocol.ts:383
_receiveRequest @ rpcProtocol.ts:299
_receiveOneMessage @ rpcProtocol.ts:226
(anonymous) @ rpcProtocol.ts:101
fire @ event.ts:581
fire @ ipc.net.ts:453
_receiveMessage @ ipc.net.ts:733
(anonymous) @ ipc.net.ts:592
fire @ event.ts:581
acceptChunk @ ipc.net.ts:239
(anonymous) @ ipc.net.ts:200
t @ ipc.net.ts:28
emit @ events.js:200
addChunk @ _stream_readable.js:294
readableAddChunk @ _stream_readable.js:275
Readable.push @ _stream_readable.js:210
onStreamRead @ internal/stream_base_commons.js:166