I can't find any references

[brookate]

Hi, I'm using gemini cli and configured settings.json

    "clangd-lsp": {
      "command": "/home/test/go/bin/mcp-language-server",
      "args": [
        "--workspace",
        "/home/test/repo/mcp_server/mcp-language-server/integrationtests/workspaces/clangd",
        "--lsp",
        "/usr/bin/clangd"
      ],
      "env": {
        "LOG_LEVEL": "DEBUG"
       },
      "alwaysAllow": [],
      "trust": true
    }

and

dell➜  clangd git:(main) ll
total 44K
-rwxr-xr-x 1 uuu uuu  16K Jul  9 16:15 clean_program
-rw-r--r-- 1 uuu uuu 6.3K Jul  9 16:15 compile_commands.json
drwxr-xr-x 1 uuu uuu   20 Jul  9 16:14 include
-rw-r--r-- 1 uuu uuu 3.0K Jul  9 16:14 Makefile
-rwxr-xr-x 1 uuu uuu  16K Jul  9 16:15 program
drwxr-xr-x 1 uuu uuu  248 Jul  9 16:15 src
dell➜  clangd git:(main) 

but when I try to find references

╭────────────────────────────────────────╮
│  > find all references helperFunction  │
╰────────────────────────────────────────╯

 ╭──────────────────────────────────────────────────────────────────────────────────────────╮
 │ ✔  references (clangd-lsp MCP Server) {"symbolName":"helperFunction"}                    │
 │                                                                                          │
 │    No references found for symbol: helperFunction                                        │
 ╰──────────────────────────────────────────────────────────────────────────────────────────╯
 ╭──────────────────────────────────────────────────────────────────────────────────────────╮
 │ ✔  SearchText 'helperFunction' in *.{cpp,hpp} within ./                                  │
 │                                                                                          │
 │    No matches found                                                                      │
 ╰──────────────────────────────────────────────────────────────────────────────────────────╯
✦ I could not find any references or definitions for helperFunction in the current directory. It
  seems this symbol does not exist in the codebase.

Using 1 GEMINI.md file and 5 MCP servers (ctrl+t to view)            YOLO mode (ctrl + y to toggle)
╭─────────────────────────────────────────────────────────────────────────────────────────────────╮
│ >   Type your message or @path/to/file                                                          │
╰─────────────────────────────────────────────────────────────────────────────────────────────────╯

~/mcp_server/mcp-language-server/integration  no sandbox   gemini-2.5-flash (98| ✖ 1 error 
tests/workspaces/clangd (main*)               (see /docs) context left)          (ctrl+o for 
                                                                                 details)

where is my wrong?