Chromium Code Reviews| Index: sky/sdk/lib/framework/fn.dart |
| diff --git a/sky/sdk/lib/framework/fn.dart b/sky/sdk/lib/framework/fn.dart |
| index cf9f871d6997acf98d907d40bde7c679791d4237..f181102004c13045ed7fdef4ec78fc3ef3a26d16 100644 |
| --- a/sky/sdk/lib/framework/fn.dart |
| +++ b/sky/sdk/lib/framework/fn.dart |
| @@ -109,6 +109,7 @@ abstract class UINode { |
| return oldNode; |
| } |
| + assert(!node._defunct); |
| node._parent = this; |
| if (oldNode == null) { |