Lua C API: pushing function with lua_pushcfunction isn't working

Question

How can I define such a Lua function using C API?

function Caller(f)
    f()
end

This is what I've tried but it crashes:

typedef lua_CFunction luaFunc;

int Caller(lua_State* luaVM)
    luaFunc Func = lua_tocfunction(luaVM, 1);

    lua_pushcfunction(luaVM, Func);
    lua_call(luaVM, 0, 0);
    return 0;
}

Answer 1

The equivalent of the Lua code

function Caller(f)
    f()
end

is

int Caller(lua_State* luaVM)    
    lua_call(luaVM, 0, 0);
    return 0;
}