Macro ifdef incorrectly parsed

[raholly]

Environment

• OS and Version: Windows 11 23H2
• VS Code Version: v1.94.2
• C/C++ Extension Version: v1.22.10
• If using SSH remote, specify OS of remote machine: CentOS 7.9

Bug Summary and Steps to Reproduce

Bug Summary:
I found that when Chinese characters appear in the middle of an ifdef macro, the code parsing will be incorrect.
The below screenshots show the issue. A very strange problem.
The first image is correct, while the parsing in the second and third images is incorrect.

By the way, I tested version 1.21.6 of the C/C++ extension and didn't encounter this issue.

Configuration and Logs

Here is c_cpp_properties.json

{
"configurations": [
{
"name": "Linux",
"includePath": [
"${workspaceFolder}/**"
],
"defines": [],
"compilerPath": "/usr/local/bin/clang",
"intelliSenseMode": "linux-clang-x64"
}
],
"version": 4
}

Other Extensions

No response

Additional context

No response

[sean-mcmanus]

@raholly Thanks for reporting this. A minimal repro is

#if 0
//测试e
#else
#endif

[sean-mcmanus]

@raholly Fixed with https://github.com/microsoft/vscode-cpptools/releases/tag/v1.23.0

[sean-mcmanus]

Also fixed with https://github.com/microsoft/vscode-cpptools/releases/tag/v1.22.11