Here we were mistakenly treating the injected-class-name as a partial
specialization.
gcc/cp/ChangeLog:
PR c++/52625
* pt.c (maybe_process_partial_specialization): Check
DECL_SELF_REFERENCE_P.
gcc/testsuite/ChangeLog:
PR c++/52625
* g++.dg/template/friend70.C: New test.
if (CLASS_TYPE_P (type) && CLASSTYPE_LAMBDA_EXPR (type))
return type;
+ /* An injected-class-name is not a specialization. */
+ if (DECL_SELF_REFERENCE_P (TYPE_NAME (type)))
+ return type;
+
if (TREE_CODE (type) == BOUND_TEMPLATE_TEMPLATE_PARM)
{
error ("name of class shadows template template parameter %qD",
--- /dev/null
+// PR c++/52625
+
+template<class>
+class base {};
+
+class derived : public base<derived>
+{
+ template<class> friend class base;
+};