diff options
Diffstat (limited to 'kernel/reduction.ml')
| -rw-r--r-- | kernel/reduction.ml | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/kernel/reduction.ml b/kernel/reduction.ml index e9be1b35d..b3e689414 100644 --- a/kernel/reduction.ml +++ b/kernel/reduction.ml @@ -269,8 +269,9 @@ let convert_constructors_gen cmp_instances cmp_cumul (mind, ind, cns) nargs u1 u if not (Int.equal num_cnstr_args nargs) then cmp_instances u1 u2 s else - let csts = get_cumulativity_constraints CONV cumi u1 u2 in - cmp_cumul csts s + (** By invariant, both constructors have a common supertype, + so they are convertible _at that type_. *) + s let convert_constructors ctor nargs u1 u2 (s, check) = convert_constructors_gen (check.compare_instances ~flex:false) check.compare_cumul_instances |