platform-ststm32: Bug with IntelliSense and paths

Reported here on Github as per request from the forums https://community.platformio.org/t/bug-with-intellisense-and-paths/30269

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Configuration

Operating system: Ubuntu 22.04.1 LTS x86_64, kernel 5.15.0-52-generic

PlatformIO Version (platformio --version):

Description of problem

I have been getting red squiggly lines from IntelliSense in VS Code on my includes (even of Arduino.h) with PIO on Ubuntu 22, but I have also found the solution.

cannot open source file "Arduino.h"C/C++(1696)

This is the exact error I am getting:

Failed to parse 
"/home/ ... /.vscode/c_cpp_properties.json": Unexpected token ( in JSON at position 85

When I go and have a look in c_cpp_properties.json it is very clear that the error is reported correctly.

By removing the backslashes, the error is resolved, and the red squiggly lines go away. However, c_cpp_properties.json is autogenerated, and the file explicitly advises against manual edits, so it is eventually just re-generated, and the error returns.

What can I do to fix this permanently?

Let me know if I need to supply more information.