Language server doesnt lint errors

Environment data

• VS Code version: 1.41
• Extension version (available under the Extensions sidebar): 2020.1.58038
• OS and version: Ubuntu 19.10
• Python version (& distribution if applicable, e.g. Anaconda): Python 3.8.0
• Type of virtual environment used (N/A | venv | virtualenv | conda | …): venv
• Relevant/affected Python packages and their versions: All in general
• Jedi or Language Server? (i.e. what is "python.jediEnabled" set to; more info #3977): Jedi=false Python Language Server=0.5.10.0

Expected behaviour

Error highlighting works

Actual behaviour

Error highlighting works

Steps to reproduce:

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

1. Open a python file and type something that is not right, eg test
2. Observe the laguage server not working

Logs

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

User belongs to experiment group 'ShowPlayIcon - start'
User belongs to experiment group 'ShowExtensionSurveyPrompt - control'
User belongs to experiment group 'DebugAdapterFactory - experiment'
> conda --version
> pyenv root
> python3.7 -c "import sys;print(sys.executable)"
> python3.6 -c "import sys;print(sys.executable)"
> python3 -c "import sys;print(sys.executable)"
> python2 -c "import sys;print(sys.executable)"
> python -c "import sys;print(sys.executable)"
> ~/coding/python/hikari/.venv/bin/python -c "import sys;print(sys.executable)"
> conda info --json
Starting Microsoft Python language server.
> conda --version

Language Server Output:

[Info  - 6:36:28 PM] Analysis cache path: /home/davfsa/snap/code/common/.cache/Microsoft/Python Language Server
[Info  - 6:36:28 PM] Microsoft Python Language Server version 0.5.10.0
[Info  - 6:36:28 PM] Workspace root: /home/davfsa/coding/python/hikari
[Info  - 6:36:28 PM] GetCurrentSearchPaths /home/davfsa/coding/python/hikari/.venv/bin/python 
[Info  - 6:36:28 PM] Interpreter search paths:
[Info  - 6:36:28 PM]     /home/davfsa/coding/python/hikari/.venv/lib/python3.8
[Info  - 6:36:28 PM]     /home/davfsa/coding/python/hikari/.venv/lib/python3.8/lib-dynload
[Info  - 6:36:28 PM]     /usr/lib/python3.8
[Info  - 6:36:28 PM]     /home/davfsa/coding/python/hikari/.venv/lib/python3.8/site-packages
[Info  - 6:36:28 PM] User search paths:
[Info  - 6:36:29 PM] Initializing for /home/davfsa/coding/python/hikari/.venv/bin/python
[Info  - 6:36:29 PM] Analysis caching mode: None.

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)

Noticed this 2 errors:

Notification handler 'textDocument/publishDiagnostics' failed with message: Cannot read property 'connected' of undefined

(node:6100) [DEP0005] DeprecationWarning: Buffer() is deprecated due to security and usability issues. Please use the Buffer.alloc(), Buffer.allocUnsafe(), or Buffer.from() methods instead.

If any further info is needed, please dont hesitate to ask

[ericloewe]

@davfsa Reverting to 2019.11.50794 works around this.

[davfsa]

@sys-temd im not looking to use a linter like pylint or flake8 (since i dont want to save all the time to check the linting). I want the language server to automatically do the linting like it did in Windows