| 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 a2fe6c182957661110134a04f28acd06f5df7fab..fb8e53b034878cc5ec9d203f2832ad98ae3b9db8 100644
 | 
| --- a/src/compiler/js-native-context-specialization.cc
 | 
| +++ b/src/compiler/js-native-context-specialization.cc
 | 
| @@ -573,7 +573,6 @@
 | 
|        Object* maybe_constructor = receiver_map->GetConstructor();
 | 
|        // Detached global proxies have |null| as their constructor.
 | 
|        if (maybe_constructor->IsJSFunction() &&
 | 
| -          JSFunction::cast(maybe_constructor)->has_context() &&
 | 
|            JSFunction::cast(maybe_constructor)->native_context() ==
 | 
|                *native_context()) {
 | 
|          return ReduceGlobalAccess(node, receiver, value, name, access_mode,
 | 
| @@ -798,6 +797,17 @@
 | 
|        // Optimize accesses to the current native contexts' global proxy.
 | 
|        return ReduceGlobalAccess(node, nullptr, value, name, access_mode);
 | 
|      }
 | 
| +  }
 | 
| +
 | 
| +  // Check if the {nexus} reports type feedback for the IC.
 | 
| +  if (nexus.IsUninitialized()) {
 | 
| +    if ((flags() & kDeoptimizationEnabled) &&
 | 
| +        (flags() & kBailoutOnUninitialized)) {
 | 
| +      return ReduceSoftDeoptimize(
 | 
| +          node,
 | 
| +          DeoptimizeReason::kInsufficientTypeFeedbackForGenericNamedAccess);
 | 
| +    }
 | 
| +    return NoChange();
 | 
|    }
 | 
|  
 | 
|    // Extract receiver maps from the IC using the {nexus}.
 | 
| @@ -1184,6 +1194,17 @@
 | 
|      }
 | 
|    }
 | 
|  
 | 
| +  // Check if the {nexus} reports type feedback for the IC.
 | 
| +  if (nexus.IsUninitialized()) {
 | 
| +    if ((flags() & kDeoptimizationEnabled) &&
 | 
| +        (flags() & kBailoutOnUninitialized)) {
 | 
| +      return ReduceSoftDeoptimize(
 | 
| +          node,
 | 
| +          DeoptimizeReason::kInsufficientTypeFeedbackForGenericKeyedAccess);
 | 
| +    }
 | 
| +    return NoChange();
 | 
| +  }
 | 
| +
 | 
|    // Extract receiver maps from the {nexus}.
 | 
|    MapHandleList receiver_maps;
 | 
|    if (!ExtractReceiverMaps(receiver, effect, nexus, &receiver_maps)) {
 | 
| @@ -2229,10 +2250,7 @@
 | 
|      }
 | 
|      return true;
 | 
|    }
 | 
| -  // Check if the {nexus} actually reports feedback for the IC. We return
 | 
| -  // true if the IC is still uninitialized, which translates to a SOFT
 | 
| -  // deoptimization exit in the callers.
 | 
| -  return nexus.IsUninitialized();
 | 
| +  return false;
 | 
|  }
 | 
|  
 | 
|  bool JSNativeContextSpecialization::InferReceiverMaps(
 | 
| 
 |