Fast path for implicit tactic solving.

We make apparent in the API that the implicit tactic is set or not. This was
costing a lot in Pretyping for no useful reason, as it is almost always unset
and the default implementation was just failing immediately.

1 files changed, 1 insertions, 1 deletions

diff --git a/tactics/tactics.ml b/tactics/tactics.ml
index 1e8082f88..8b3442c05 100644
--- a/tactics/tactics.ml
+++ b/tactics/tactics.ml
@@ -1146,7 +1146,7 @@ let run_delayed env sigma c =
 let tactic_infer_flags with_evar = {
   Pretyping.use_typeclasses = true;
   Pretyping.solve_unification_constraints = true;
-  Pretyping.use_hook = Some solve_by_implicit_tactic;
+  Pretyping.use_hook = solve_by_implicit_tactic ();
   Pretyping.fail_evar = not with_evar;
   Pretyping.expand_evars = true }