From: Jason Merrill <jason@redhat.com>
Date: Fri, 4 Mar 2016 16:07:20 +0000 (-0500)
Subject: re PR c++/70067 (internal compiler error: in strip_typedefs, at cp/tree.c:1466)
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=b54eff8bb1131e7bbd1e03633460be120f11ec99;p=gcc.git

re PR c++/70067 (internal compiler error: in strip_typedefs, at cp/tree.c:1466)

	PR c++/70067

	* tree.c (strip_typedefs): Handle TYPENAME_TYPE lookup finding the
	same type.

From-SVN: r233973
---

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index 5f6d69a4622..0f23bd770b7 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,9 @@
+2016-03-04  Jason Merrill  <jason@redhat.com>
+
+	PR c++/70067
+	* tree.c (strip_typedefs): Handle TYPENAME_TYPE lookup finding the
+	same type.
+
 2016-03-03  Jason Merrill  <jason@redhat.com>
 
 	* method.c (synthesized_method_walk): operator= can also be constexpr.
diff --git a/gcc/cp/tree.c b/gcc/cp/tree.c
index 0b7b1443b60..aaf9a4f2188 100644
--- a/gcc/cp/tree.c
+++ b/gcc/cp/tree.c
@@ -1437,6 +1437,9 @@ strip_typedefs (tree t, bool *remove_attributes)
 	result = make_typename_type (strip_typedefs (TYPE_CONTEXT (t),
 						     remove_attributes),
 				     fullname, typename_type, tf_none);
+	/* Handle 'typedef typename A::N N;'  */
+	if (typedef_variant_p (result))
+	  result = TYPE_MAIN_VARIANT (DECL_ORIGINAL_TYPE (TYPE_NAME (result)));
       }
       break;
     case DECLTYPE_TYPE:
diff --git a/gcc/testsuite/g++.dg/template/typename21.C b/gcc/testsuite/g++.dg/template/typename21.C
new file mode 100644
index 00000000000..e5e59b1efd3
--- /dev/null
+++ b/gcc/testsuite/g++.dg/template/typename21.C
@@ -0,0 +1,11 @@
+// PR c++/70067
+// { dg-do compile { target c++98 } }
+
+template <class> struct A;
+template <class T> struct B { struct N { }; };
+template <class T> struct D: B<T> {
+  typedef typename D::N N;
+  A<N> *a;
+};
+
+D<int> d;