VS Code loses automatic syntax highlighting

[oliverdrummond]

Issue Type: Bug

1- Copy python code into empty VS Code tab; 2- Wait for VS Code to add the automatic syntax highlighting; 3- Hover the mouse over a variable; 4- Press Ctrl key (I was trying to "Go to definition)

VS Code will lose the previously language displayed in "Select Language Mode" (It will change from Python to Plain Text)

VS Code version: Code 1.60.1 (83bd43bc519d15e50c4272c6cf5c1479df196a4d, 2021-09-10T17:07:10.714Z) OS version: Windows_NT x64 10.0.19043 Restricted Mode: No

[TylerLeonhardt]

@oliverdrummond thanks for opening this, I'm having a hard time reproing. maybe send a gif of what you're seeing?

[TylerLeonhardt]

/gifPlease

[oliverdrummond]

Sure! Here it goes. Please let me know if you need more details for this :)

[oliverdrummond]

Is this enough information?

Thanks

[TylerLeonhardt]

This is bizarre. I can't reproduce it, I'm afraid. What extensions do you have installed? Do you have any keybindings defined? Does this reproduce with a python file on your filesytem?

[oliverdrummond]

It is quite weird indeed :(

Here is the list of installed extensions

code --install-extension Angular.ng-template
code --install-extension CoenraadS.bracket-pair-colorizer-2
code --install-extension DavidAnson.vscode-markdownlint    
code --install-extension dbaeumer.vscode-eslint
code --install-extension eamodio.gitlens
code --install-extension ecmel.vscode-html-css
code --install-extension esbenp.prettier-vscode
code --install-extension fabiospampinato.vscode-todo-plus
code --install-extension fredu.color-conversion
code --install-extension GitHub.copilot
code --install-extension HookyQR.beautify
code --install-extension igress.python-coding-conventions
code --install-extension infinity1207.angular2-switcher
code --install-extension johnpapa.Angular2
code --install-extension mlewand.select-part-of-word
code --install-extension ms-pyright.pyright
code --install-extension ms-python.python
code --install-extension ms-python.vscode-pylance
code --install-extension philsinatra.nested-comments
code --install-extension SantaCodes.santacodes-region-viewer
code --install-extension SirTori.indenticator
code --install-extension streetsidesoftware.code-spell-checker
code --install-extension VisualStudioExptTeam.vscodeintellicode
code --install-extension vscode-icons-team.vscode-icons
code --install-extension wmaurer.change-case
code --install-extension wwm.better-align
code --install-extension yzhang.markdown-all-in-one
code --install-extension Zignd.html-css-class-completion

Here are my keyboard shortcuts

And no, this does not reproduce on python files on my filesystem. Actually, if I set the language as "Python" manually (without the newly added automatic syntax highlighting), this bug does not happen.

Crazy, right?

[TylerLeonhardt]

I'm trying to narrow down where the problem might be... two recommendations:

• Can you tell me if this only repros with Python? Can you repro with say TypeScript or any other language?
• Can you run an Extension Bisect (command palette -> "Start Extension Bisect")? This will attempt to rule out if it's an extension issue by disabling half of your extensions at a time until you can/can't repro anymore.