@@ -3157,6 +3157,7 @@ finish_template_type (tree name, tree args, int entering_scope)
if (flag_concepts
&& entering_scope
&& CLASS_TYPE_P (type)
+ && CLASSTYPE_TEMPLATE_INFO (type)
&& dependent_type_p (type)
&& PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (type)))
type = fixup_template_type (type);
new file mode 100644
@@ -0,0 +1,18 @@
+// PR c++/59200
+// { dg-options "-std=c++1z -fconcepts" }
+
+struct A
+{
+ static constexpr bool value = true;
+};
+
+template<typename T>
+struct B
+{
+ template<typename U>
+ using C = A;
+};
+
+template<typename T>
+template<typename U>
+ const bool B<T>::C<U>::value; // { dg-error "too many" }