>
>
> $ git diff src/sage/sets/disjoint_union_enumerated_sets.py
> diff --git a/src/sage/sets/disjoint_union_enumerated_sets.py
> b/src/sage/sets/disjoint_union_enumerated_sets.py
> index c6d35ea8bd..f5fdba7119 100644
> --- a/src/sage/sets/disjoint_union_enumerated_sets.py
> +++ b/src/sage/se
On Jun 20, 'Travis Scrimshaw' via sage-devel wrote:
That definitely is not a bug in CombinatorialFreeModule, so there shouldn't be
anything changed there. It is doing what it is told: that its indexing set is
in finite sets. I would say the bug is purely in the
DisjointUnionEnumeratedSets not doi
