re PR c++/58701 ([c++11] ICE initializing member of static union)

	PR c++/58701
	* semantics.c (build_anon_member_initialization): Stop walking
	when we run out of COMPONENT_REFs.

From-SVN: r207209

gcc/cp/ChangeLog

 2014-01-28  Jason Merrill  <jason@redhat.com>
 
+	PR c++/58701
+	* semantics.c (build_anon_member_initialization): Stop walking
+	when we run out of COMPONENT_REFs.
+
 	PR c++/58632
 	* decl.c (lookup_and_check_tag): Ignore template parameters if
 	scope == ts_current.

gcc/cp/semantics.c

@@ -7515,7 +7515,8 @@ build_anon_member_initialization (tree member, tree init,
       fields.safe_push (TREE_OPERAND (member, 1));
       member = TREE_OPERAND (member, 0);
     }
-  while (ANON_AGGR_TYPE_P (TREE_TYPE (member)));
+  while (ANON_AGGR_TYPE_P (TREE_TYPE (member))
+	 && TREE_CODE (member) == COMPONENT_REF);
 
   /* VEC has the constructor elements vector for the context of FIELD.
      If FIELD is an anonymous aggregate, we will push inside it.  */

gcc/testsuite/g++.dg/cpp0x/nsdmi-union5.C

+// PR c++/58701
+// { dg-require-effective-target c++11 }
+// { dg-final { scan-assembler "7" } }
+
+static union
+{
+  union
+  {
+    int i = 7;
+  };
+};