- Some(Provenance::Concrete { alloc_id: left_alloc, sb: left_sb }),
- Some(Provenance::Concrete { alloc_id: right_alloc, sb: right_sb }),
- ) if left_alloc == right_alloc && left_sb == right_sb => left,
+ Some(Provenance::Concrete { alloc_id: left_alloc, tag: left_tag }),
+ Some(Provenance::Concrete { alloc_id: right_alloc, tag: right_tag }),
+ ) if left_alloc == right_alloc && left_tag == right_tag => left,