Function unlinkupval

Source/Misc/lua/src/lua.c:5910–5914

static void unlinkupval (UpVal *uv) {
lua_assert(uv->u.l.next->u.l.prev == uv && uv->u.l.prev->u.l.next == uv);
uv->u.l.next->u.l.prev = uv->u.l.prev;  /* remove from `uvhead' list */
uv->u.l.prev->u.l.next = uv->u.l.next;
}


void luaF_freeupval (lua_State *L, UpVal *uv) {