> I believe the 'tbc' field of UpVal: > https://github.com/lua/lua/blob/c954db39241a8b21d7b32b42b87a066b4708f969/lobject.h#L620 > > is unnecessary since the to-be-closed variable handling changes starting with > https://github.com/lua/lua/commit/4e47f81188d37e29027158b76271d02a781242e2 . > > It's only referenced in newupval, which is never called with anything > but 0 for the value. That's right. Thanks for the report. -- Roberto