| Index: sdk/lib/_internal/compiler/implementation/dart_backend/renamer.dart | 
| diff --git a/sdk/lib/_internal/compiler/implementation/dart_backend/renamer.dart b/sdk/lib/_internal/compiler/implementation/dart_backend/renamer.dart | 
| index 886d39e2f1bcdd7ccc66acfe255566e334fd3d12..4b9f3e07c5b4c59d5c55d77c591e4df2952713c6 100644 | 
| --- a/sdk/lib/_internal/compiler/implementation/dart_backend/renamer.dart | 
| +++ b/sdk/lib/_internal/compiler/implementation/dart_backend/renamer.dart | 
| @@ -191,7 +191,7 @@ void renamePlaceholders( | 
| sorted(functionScope.localPlaceholders, | 
| compareBy((LocalPlaceholder ph) => -ph.nodes.length)); | 
| List<Set<Node>> currentSortedNodes = | 
| -          currentSortedPlaceholders.map((ph) => ph.nodes).toList(); | 
| +          currentSortedPlaceholders.mappedBy((ph) => ph.nodes).toList(); | 
| // Make room in all sorted locals list for new stuff. | 
| while (currentSortedNodes.length > allSortedLocals.length) { | 
| allSortedLocals.add(new Set<Node>()); | 
|  |