| Index: tests/compiler/dart2js/type_mask_test.dart
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| diff --git a/tests/compiler/dart2js/type_mask_test.dart b/tests/compiler/dart2js/type_mask_test.dart
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| index 0547260f9b2b6f8089e2ea6881037da2b8d43f9a..ce5adacd66377cadbd8dc14bc43a8ce6d2968d96 100644
 | 
| --- a/tests/compiler/dart2js/type_mask_test.dart
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| +++ b/tests/compiler/dart2js/type_mask_test.dart
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| @@ -21,7 +21,7 @@ main() {
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|  main() {
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|    Uri uri = new Uri(scheme: 'source');
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|    var compiler = compilerFor(CODE, uri);
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| -  var classWorld = compiler.world;
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| +  var classWorld = compiler.closedWorld;
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|  
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|    asyncTest(() => compiler.run(uri).then((_) {
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|      var classA = findElement(compiler, 'A');
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| 
 |