| Index: sdk/lib/_internal/compiler/implementation/js_backend/emitter.dart
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| diff --git a/sdk/lib/_internal/compiler/implementation/js_backend/emitter.dart b/sdk/lib/_internal/compiler/implementation/js_backend/emitter.dart
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| index f4c39663a33c2a3062c5a5bb17299d8fdde4d0a4..8d4ba2e1a54d92268aecf2af9bd776e7c3c8313c 100644
 | 
| --- a/sdk/lib/_internal/compiler/implementation/js_backend/emitter.dart
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| +++ b/sdk/lib/_internal/compiler/implementation/js_backend/emitter.dart
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| @@ -2043,6 +2043,9 @@ class CodeEmitterTask extends CompilerTask {
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|          ClassElement receiverClass = objectClass;
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|          TypeMask mask = selector.mask;
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|          if (mask != null) {
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| +          // If the mask is empty it doesn't contain a noSuchMethod
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| +          // handler -- not even if it is nullable.
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| +          if (mask.isEmpty) continue;
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|            receiverClass = mask.base.element;
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|          }
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|  
 | 
| 
 |