lambda.c (maybe_add_lambda_conv_op): Only set no_sanitize_undefined if SANITIZE_NULL.

	* lambda.c (maybe_add_lambda_conv_op): Only set
	no_sanitize_undefined if SANITIZE_NULL.

From-SVN: r230908

gcc/cp/ChangeLog

 2015-11-25  Jason Merrill  <jason@redhat.com>
 
+	* lambda.c (maybe_add_lambda_conv_op): Only set
+	no_sanitize_undefined if SANITIZE_NULL.
+
 	PR c++/67941
 	* lambda.c (maybe_add_lambda_conv_op): Mark _FUN as
 	no_sanitize_undefined.

gcc/cp/lambda.c

@@ -1053,11 +1053,14 @@ maybe_add_lambda_conv_op (tree type)
   if (generic_lambda_p)
     fn = add_inherited_template_parms (fn, DECL_TI_TEMPLATE (callop));
 
-  /* Don't UBsan this function; we're deliberately calling op() with a null
-     object argument.  */
-  tree attrs = build_tree_list (get_identifier ("no_sanitize_undefined"),
-				NULL_TREE);
-  cplus_decl_attributes (&fn, attrs, 0);
+  if (flag_sanitize & SANITIZE_NULL)
+    {
+      /* Don't UBsan this function; we're deliberately calling op() with a null
+	 object argument.  */
+      tree attrs = build_tree_list (get_identifier ("no_sanitize_undefined"),
+				    NULL_TREE);
+      cplus_decl_attributes (&fn, attrs, 0);
+    }
 
   add_method (type, fn, NULL_TREE);