gccrs: Add missing param subst callback

Signed-off-by: Philip Herron <herron.philip@googlemail.com>
gcc/rust/ChangeLog:

	* typecheck/rust-tyty-subst.cc: add missing callback

diff --git a/gcc/rust/typecheck/rust-tyty-subst.cc b/gcc/rust/typecheck/rust-tyty-subst.cc
index 0e181efb359e64479ef83238351823e50a3b4c1d..7f5bb22687d5c20be211c2f0407dabcf78f07dad 100644 (file)
--- a/gcc/rust/typecheck/rust-tyty-subst.cc
+++ b/gcc/rust/typecheck/rust-tyty-subst.cc
@@ -141,6 +141,7 @@ SubstitutionParamMapping::fill_param_ty (
        bound.handle_substitions (subst_mappings);
 
       param->set_ty_ref (type.get_ref ());
+      subst_mappings.on_param_subst (*param, arg);
     }
 
   return true;