| Index: pkg/compiler/lib/src/types/type_mask.dart
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| diff --git a/pkg/compiler/lib/src/types/type_mask.dart b/pkg/compiler/lib/src/types/type_mask.dart
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| index d14bd95e754ccefc69947c7e02ee5b82ff45a59a..578dbacbb4697dac5834df86f81f33a95435707d 100644
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| --- a/pkg/compiler/lib/src/types/type_mask.dart
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| +++ b/pkg/compiler/lib/src/types/type_mask.dart
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| @@ -24,7 +24,8 @@ class IncreasingTypeMaskSet extends UniverseSelectorConstraints {
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|    @override
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|    bool needsNoSuchMethodHandling(Selector selector, ClassWorld world) {
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|      if (isAll) {
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| -      TypeMask mask = new TypeMask.subclass(world.objectClass, world);
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| +      TypeMask mask =
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| +          new TypeMask.subclass(world.coreClasses.objectClass, world);
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|        return mask.needsNoSuchMethodHandling(selector, world);
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|      }
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|      for (TypeMask mask in _masks) {
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| 
 |