re PR c++/65072 (Segfault when parsing dectlype in trailing return type)

	PR c++/65072
	* typeck.c (lookup_anon_field): Make sure we're dealing with the main
	variant.

	* g++.dg/cpp0x/pr65072.C: New test.

From-SVN: r221535

gcc/cp/ChangeLog

+2015-03-20  Marek Polacek  <polacek@redhat.com>
+
+	PR c++/65072
+	* typeck.c (lookup_anon_field): Make sure we're dealing with the main
+	variant.
+
 2015-03-19  Jason Merrill  <jason@redhat.com>
 
 	PR c++/65046

gcc/cp/typeck.c

@@ -2213,6 +2213,8 @@ lookup_anon_field (tree t, tree type)
 {
   tree field;
 
+  t = TYPE_MAIN_VARIANT (t);
+
   for (field = TYPE_FIELDS (t); field; field = DECL_CHAIN (field))
     {
       if (TREE_STATIC (field))

gcc/testsuite/ChangeLog

+2015-03-20  Marek Polacek  <polacek@redhat.com>
+
+	PR c++/65072
+	* g++.dg/cpp0x/pr65072.C: New test.
+
 2015-03-20  Richard Biener  <rguenther@suse.de>
 
 	PR middle-end/64715

gcc/testsuite/g++.dg/cpp0x/pr65072.C

+// PR c++/65075
+// { dg-do compile { target c++11 } }
+// { dg-options "-Wno-pedantic" }
+
+template <typename> class C
+{
+  struct
+  {
+    int i;
+  };
+  auto operator*(const C m) -> decltype (m.i);
+};
+void fn1 (const C<float>);
+C<float> a;