re PR c++/53651 ([C++11] seg fault when specifying using decltype(...)::method)

	PR c++/53651
	* name-lookup.c (constructor_name_p): Don't try to look at the
	name of a DECLTYPE_TYPE.

From-SVN: r188807

gcc/cp/ChangeLog

+2012-06-14  Jason Merrill  <jason@redhat.com>
+
+	PR c++/53651
+	* name-lookup.c (constructor_name_p): Don't try to look at the
+	name of a DECLTYPE_TYPE.
+
 2012-06-18  Lawrence Crowl  <crowl@google.com>
 
 	* decl2.c (cp_write_global_declarations): Rename use of TV_PHASE_CGRAPH

gcc/cp/name-lookup.c

@@ -1966,6 +1966,11 @@ constructor_name_p (tree name, tree type)
   if (TREE_CODE (name) != IDENTIFIER_NODE)
     return false;
 
+  /* These don't have names.  */
+  if (TREE_CODE (type) == DECLTYPE_TYPE
+      || TREE_CODE (type) == TYPEOF_TYPE)
+    return false;
+
   ctor_name = constructor_name_full (type);
   if (name == ctor_name)
     return true;

gcc/testsuite/ChangeLog

+2012-06-14  Jason Merrill  <jason@redhat.com>
+
+	PR c++/53651
+	* g++.dg/cpp0x/decltype37.C: New.
+
 2012-06-19  Kaz Kojima  <kkojima@gcc.gnu.org>
 
 	* gcc.dg/stack-usage-1.c: Use sh*-*-* instead of sh-*-*.

gcc/testsuite/g++.dg/cpp0x/decltype37.C

+// PR c++/53651
+// { dg-do compile { target c++11 } }
+
+template<typename> struct wrap { void bar(); };
+
+template<typename T> auto foo(T* t) -> wrap<T>* { return 0; }
+
+template<typename T>
+struct holder : decltype(*foo((T*)0)) // { dg-error "class type" }
+{
+    using decltype(*foo((T*)0))::bar; // { dg-error "is not a base" }
+};
+
+holder<int> h;