re PR c++/46129 (ICE: in tsubst_copy, at cp/pt.c:11375)

	PR c++/46129
	* pt.c (instantiate_class_template): Don't instantiate default
	arguments.

From-SVN: r165850

gcc/cp/ChangeLog

 2010-10-22  Jason Merrill  <jason@redhat.com>
 
+	PR c++/46129
+	* pt.c (instantiate_class_template): Don't instantiate default
+	arguments.
+
 	PR c++/46103
 	* init.c (build_vec_init): Handle memberwise move.
 

gcc/cp/pt.c

@@ -8238,17 +8238,12 @@ instantiate_class_template (tree type)
   finish_struct_1 (type);
   TYPE_BEING_DEFINED (type) = 0;
 
-  /* Now that the class is complete, instantiate default arguments for
-     any member functions.  We don't do this earlier because the
-     default arguments may reference members of the class.  */
-  if (!PRIMARY_TEMPLATE_P (templ))
-    for (t = TYPE_METHODS (type); t; t = DECL_CHAIN (t))
-      if (TREE_CODE (t) == FUNCTION_DECL
-	  /* Implicitly generated member functions will not have template
-	     information; they are not instantiations, but instead are
-	     created "fresh" for each instantiation.  */
-	  && DECL_TEMPLATE_INFO (t))
-	tsubst_default_arguments (t);
+  /* We don't instantiate default arguments for member functions.  14.7.1:
+
+     The implicit instantiation of a class template specialization causes
+     the implicit instantiation of the declarations, but not of the
+     definitions or default arguments, of the class member functions,
+     member classes, static data members and member templates....  */
 
   /* Some typedefs referenced from within the template code need to be access
      checked at template instantiation time, i.e now. These types were

gcc/testsuite/ChangeLog

 2010-10-22  Jason Merrill  <jason@redhat.com>
 
+	PR c++/46129
+	* g++.dg/template/defarg14.C: New.
+
+2010-10-22  Jason Merrill  <jason@redhat.com>
+
 	PR c++/46103
 	* g++.dg/cpp0x/implicit10.C: New.
 

gcc/testsuite/g++.dg/template/defarg14.C

+// PR c++/46129
+// The default argument for A<int>::B::operator() should not be instantiated
+
+template <class T>
+struct A {
+  struct B {
+    void operator () (const T& d_ = f(T()) ) { }
+  };
+};
+
+int main() {
+  A<int>::B b;
+}