C++-Attributes mess with function search in locator

Functions can befound in the locator with "." or "m".
But when you add a C++ attribute to a function parameter the function can't be found with "m" and every attribute adds an entry for the function when searching with ".".

e.g. this function is found 3 times with ".":

int main([[maybe_unused]] int argc, [[maybe_unused]] char *argv[])
{
}

Tested with master: 8d760eff8f5fd3f3b2c545706d55bba0ac16b729