47   uv->v = &uv->u.value;  in luaF_newupval()
48   setnilvalue(uv->v);  in luaF_newupval()
58   while (*pp != NULL && (p = ngcotouv(*pp))->v >= level) {  in luaF_findupval()
59     lua_assert(p->v != &p->u.value);  in luaF_findupval()
60     if (p->v == level) {  /* found a corresponding upvalue? */  in luaF_findupval()
70   uv->v = level;  /* current value lives in the stack */  in luaF_findupval()
90   if (uv->v != &uv->u.value)  /* is it open? */  in luaF_freeupval()
99   while (L->openupval != NULL && (uv = ngcotouv(L->openupval))->v >= level) {  in luaF_close()
101     lua_assert(!isblack(o) && uv->v != &uv->u.value);  in luaF_close()
107       setobj(L, &uv->u.value, uv->v);  in luaF_close()
108       uv->v = &uv->u.value;  /* now current value lives here */  in luaF_close()