| Index: src/compiler/js-native-context-specialization.cc
 | 
| diff --git a/src/compiler/js-native-context-specialization.cc b/src/compiler/js-native-context-specialization.cc
 | 
| index 4d87638b31838d951fbf6838499644638b843d9e..8b18cbae492b80549ab879f67a7d38e1446664b4 100644
 | 
| --- a/src/compiler/js-native-context-specialization.cc
 | 
| +++ b/src/compiler/js-native-context-specialization.cc
 | 
| @@ -1547,6 +1547,7 @@ JSNativeContextSpecialization::BuildPropertyAccess(
 | 
|      DCHECK(access_info.IsGeneric());
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|      DCHECK_EQ(AccessMode::kStore, access_mode);
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|      DCHECK(vector->IsStoreIC(slot));
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| +    DCHECK_EQ(vector->GetLanguageMode(slot), language_mode);
 | 
|      Callable callable =
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|          CodeFactory::StoreICInOptimizedCode(isolate(), language_mode);
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|      const CallInterfaceDescriptor& descriptor = callable.descriptor();
 | 
| 
 |