Variable annotation hint error

[fufu1437]

Environment

• OS and Version: Ubuntu 24.04.3 LTS
• VS Code Version:1.106.3 bf9252a2fb45be6893dd8870c0bf37e2e1766d61 x64
• C/C++ Extension Version: 1.28.3
• If using SSH remote, specify OS of remote machine:

Bug Summary and Steps to Reproduce

Bug Summary:

Using similar
(int a, //asd
b, //dx
)
The method creates multiple variables, when using variable b later, it displays the comment of variable a, i.e., asd, but it should be dx

Configuration and Logs

No configuration in c_cpp_properties.json

Running C/C++: Log Diagnostics :
-------- Diagnostics - 2025/11/30 11:10:31
Version: 1.28.3
Current Configuration:
{
    "name": "Linux",
    "includePath": [
        "/home/fufu/项目/C/c4/**"
    ],
    "defines": [],
    "compilerPath": "/usr/bin/clang",
    "cStandard": "c17",
    "cppStandard": "c++17",
    "intelliSenseMode": "linux-clang-x64",
    "compilerPathInCppPropertiesJson": "/usr/bin/clang",
    "intelliSenseModeIsExplicit": false,
    "cStandardIsExplicit": false,
    "cppStandardIsExplicit": false,
    "mergeConfigurations": false,
    "recursiveIncludes": {},
    "recursiveIncludesReduceIsExplicit": false,
    "recursiveIncludesPriorityIsExplicit": false,
    "recursiveIncludesOrderIsExplicit": false,
    "compilerPathIsExplicit": false,
    "browse": {
        "limitSymbolsToIncludedHeaders": true
    }
}
Additional Tracked Settings:
{
    "editorTabSize": 4,
    "editorInsertSpaces": true,
    "editorAutoClosingBrackets": "languageDefined",
    "filesEncoding": "utf8",
    "filesAssociations": {
        "*.toml": "toml"
    },
    "filesExclude": {
        "**/.git": true,
        "**/.svn": true,
        "**/.hg": true,
        "**/.DS_Store": true,
        "**/Thumbs.db": true
    },
    "filesAutoSaveAfterDelay": false,
    "editorInlayHintsEnabled": true,
    "editorParameterHintsEnabled": true,
    "searchExclude": {
        "**/node_modules": true,
        "**/bower_components": true,
        "**/*.code-search": true
    },
    "workbenchSettingsEditor": "ui"
}
cpptools version (native): 1.28.3.0
Current database path: /home/fufu/.cache/vscode-cpptools/6e915ae8f1608d34a99382d070a9ccfc/.browse.VC.db
Translation Unit Mappings:
[ /home/fufu/项目/C/c4/c4.c - source TU]:
Translation Unit Configurations:
[ /home/fufu/项目/C/c4/c4.c ]
    Process ID: 13134
    Memory Usage: 24 MB
    Compiler Path: /usr/bin/clang
    Include paths:
        system include: /usr/lib/llvm-18/lib/clang/18/include
        system include: /usr/local/include
        system include: /usr/include/x86_64-linux-gnu
        system include: /usr/include
    Standard Version: c17
    IntelliSense Mode: linux-clang-x64
    Other Flags:
        --clang
        --clang_version=180103
Total Memory Usage: 24 MB

------- Workspace parsing diagnostics -------
Number of files discovered (not excluded): 8537

Other Extensions

background: Background Modification Plugin(The issue still exists after disabling the plugin)
Chinese (Simplified) (简体中文) Language Pack for Visual Studio Code: Provide Chinese pages for Chinese developers

Additional context

No response

[sean-mcmanus]

I've reported a bug on our VS shared code at https://developercommunity.visualstudio.com/t/C-doc-comments-for-comma-separated-var/11008791 ; however, I think this is most likely a known issue (limitation in the implementation).