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-rw-r--r--toplevel/himsg.ml5
1 files changed, 3 insertions, 2 deletions
diff --git a/toplevel/himsg.ml b/toplevel/himsg.ml
index 421a975f17..9aa1486405 100644
--- a/toplevel/himsg.ml
+++ b/toplevel/himsg.ml
@@ -293,8 +293,9 @@ let explain_unification_error env sigma p1 p2 = function
| InstanceNotSameType (evk,env,t,u) ->
let t, u = pr_explicit env sigma t u in
spc () ++ str "(unable to find a well-typed instantiation for " ++
- quote (pr_existential_key sigma evk) ++ strbrk ": cannot unify " ++
- t ++ strbrk " and " ++ u ++ str ")"
+ quote (pr_existential_key sigma evk) ++
+ strbrk ": cannot ensure that " ++
+ t ++ strbrk " is a subtype of " ++ u ++ str ")"
| UnifUnivInconsistency p ->
if !Constrextern.print_universes then
spc () ++ str "(Universe inconsistency: " ++