luaF_freeupval    104 lib/lua/lfunc.c       luaF_freeupval(L, uv);  /* free upvalue */
luaF_freeupval     29 lib/lua/lfunc.h LUAI_FUNC void luaF_freeupval (lua_State *L, UpVal *uv);
luaF_freeupval    382 lib/lua/lgc.c      case LUA_TUPVAL: luaF_freeupval(L, gco2uv(o)); break;