re PR c++/65973 (segmentation fault when compiling C++14 code)

	PR c++/65973
	* constexpr.c (build_constexpr_constructor_member_initializers):
	Handle an empty STATEMENT_LIST.

From-SVN: r224677

gcc/cp/ChangeLog

 2015-06-19  Jason Merrill  <jason@redhat.com>
 
+	PR c++/65973
+	* constexpr.c (build_constexpr_constructor_member_initializers):
+	Handle an empty STATEMENT_LIST.
+
 	PR c++/65843
 	* pt.c (tsubst_copy_and_build): Register a capture proxy in
 	local_specializations.

gcc/cp/constexpr.c

@@ -537,16 +537,16 @@ build_constexpr_constructor_member_initializers (tree type, tree body)
     body = TREE_OPERAND (body, 0);
   if (TREE_CODE (body) == STATEMENT_LIST)
     {
-      tree_stmt_iterator i = tsi_start (body);
-      while (true)
+      for (tree_stmt_iterator i = tsi_start (body);
+	   !tsi_end_p (i); tsi_next (&i))
 	{
 	  body = tsi_stmt (i);
 	  if (TREE_CODE (body) == BIND_EXPR)
 	    break;
-	  tsi_next (&i);
 	}
     }
-  body = BIND_EXPR_BODY (body);
+  if (TREE_CODE (body) == BIND_EXPR)
+    body = BIND_EXPR_BODY (body);
   if (TREE_CODE (body) == CLEANUP_POINT_EXPR)
     {
       body = TREE_OPERAND (body, 0);

gcc/testsuite/g++.dg/cpp1y/constexpr-empty1.C

+// PR c++/65973
+// { dg-do compile { target c++14 } }
+
+class foo {
+  constexpr foo() noexcept { __func__; };
+};