intermittent linting errors (standard library not found)

[bertsons]

Environment

• OS and Version: Ubuntu 24.04
• VS Code Version: 1.101.2
• C/C++ Extension Version: 1.26.3

Bug Summary and Steps to Reproduce

Bug Summary:
I intermittently get linting errors everywhere signalling the standard lib hasn't been found.

This has been happening intermittently for quite a while now. Sometimes restarting VS Code works. Sometimes it doesn't.

Steps to reproduce:

1. open up VS Code
2. it's intermittent, so it may or may not happen.

Expected behavior:

Configuration and Logs

c_cpp_properties.json:

{
    "configurations": [
        {
            "name": "Linux",
            "includePath": [
                "${workspaceFolder}/**"
            ],
            "defines": [],
            "cStandard": "c17",
            "cppStandard": "gnu++17",
            "intelliSenseMode": "linux-gcc-x64",
            "configurationProvider": "ms-vscode.cmake-tools"
        }
    ],
    "version": 4
}

Log Diagnostics:

Log Diagnostics.txt

Logs from language server logging: Wheen I turned this into debug mode, the issue stopped, so was unable to get anything meaningufl for this. I'll try to add it when it happens again

Other Extensions

No response

Additional context

No response

[sean-mcmanus]

@bertsons Does setting C_Cpp.intelliSenseCacheSize to 0 fix it? There are some known bugs in which the cache can become invalid.

Otherwise, does the correct file open when you do Go to Def on "string"? Then when you do C/C++: Log Diagnostics with the string header open, does it indicate it belongs to the same TU as the file reporting that string is not in "std"?

[bertsons]

@sean-mcmanus I've set "C_Cpp.intelliSenseCacheSize": 0 in settings.json. I'll let you if I haven't had any issues for a while

[bertsons]

if you never hear from me again, it might mean it's fixed... because I'll probably only remember to come back the next time this issues happens :)