stackpos          497 lib/lua/ldebug.c static const char *getobjname (lua_State *L, CallInfo *ci, int stackpos,
stackpos          503 lib/lua/ldebug.c     *name = luaF_getlocalname(p, stackpos+1, pc);
stackpos          506 lib/lua/ldebug.c     i = symbexec(p, pc, stackpos);  /* try symbolic execution */