| Index: pkg/analyzer/lib/file_system/memory_file_system.dart
 | 
| diff --git a/pkg/analyzer/lib/file_system/memory_file_system.dart b/pkg/analyzer/lib/file_system/memory_file_system.dart
 | 
| index 93428bc8148bfba0f6a824daec28b3a4ffe23d91..5035b93c8ceb3deed6324e7f81fbc56d0ac7b354 100644
 | 
| --- a/pkg/analyzer/lib/file_system/memory_file_system.dart
 | 
| +++ b/pkg/analyzer/lib/file_system/memory_file_system.dart
 | 
| @@ -296,7 +296,7 @@ class _MemoryDummyLink extends _MemoryResource implements File {
 | 
|    }
 | 
|  
 | 
|    @override
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| -  Resource renameSync(String newPath) {
 | 
| +  File renameSync(String newPath) {
 | 
|      throw new FileSystemException(path, 'File could not be renamed');
 | 
|    }
 | 
|  
 | 
| 
 |