VUPVAL            310 lib/lua/lcode.c     case VUPVAL: {
VUPVAL            479 lib/lua/lcode.c     case VUPVAL: {
VUPVAL            200 lib/lua/lparser.c   lua_assert(v->k == VLOCAL || v->k == VUPVAL);
VUPVAL            241 lib/lua/lparser.c       var->k = VUPVAL;  /* upvalue in this level */
VUPVAL            242 lib/lua/lparser.c       return VUPVAL;