Merge branch 'v8.6'

1 files changed, 1 insertions, 1 deletions

diff --git a/proofs/evar_refiner.ml b/proofs/evar_refiner.ml
index 58b8811741..5f0cc73d2c 100644
--- a/proofs/evar_refiner.ml
+++ b/proofs/evar_refiner.ml
@@ -56,6 +56,6 @@ let w_refine (evk,evi) (ltac_var,rawc) sigma =
       let loc = Glob_ops.loc_of_glob_constr rawc in
       user_err_loc
         (loc,"", str "Instance is not well-typed in the environment of " ++
-                 str (string_of_existential evk))
+                 pr_existential_key sigma evk ++ str ".")
   in
   define_and_solve_constraints evk typed_c env (evars_reset_evd sigma' sigma)