Bailout from CanLoadMonomorphic if a prototype with a deprecated map cannot be migrated.

src/hydrogen.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 4747 matching lines @@
 
   return true;
 }
 
 
 bool HOptimizedGraphBuilder::PropertyAccessInfo::LookupInPrototypes() {
   Handle<Map> map = map_;
   while (map->prototype()->IsJSObject()) {
     holder_ = handle(JSObject::cast(map->prototype()));
     if (holder_->map()->is_deprecated()) {
-      JSObject::TryMigrateInstance(holder_);
+      Handle<Object> result = JSObject::TryMigrateInstance(holder_);
+      if (result.is_null()) return false;
     }
     map = Handle<Map>(holder_->map());
-    if (!CanInlinePropertyAccess(*map)) {
-      lookup_.NotFound();
-      return false;
-    }
+    if (!CanInlinePropertyAccess(*map)) return false;
     map->LookupDescriptor(*holder_, *name_, &lookup_);
     if (lookup_.IsFound()) return LoadResult(map);
   }
   lookup_.NotFound();
   return true;
 }
 
 
 bool HOptimizedGraphBuilder::PropertyAccessInfo::CanLoadMonomorphic() {
   if (!CanInlinePropertyAccess(*map_)) return IsStringLength();
@@ skipping 5039 matching lines @@
   if (ShouldProduceTraceOutput()) {
     isolate()->GetHTracer()->TraceHydrogen(name(), graph_);
   }
 
 #ifdef DEBUG
   graph_->Verify(false);  // No full verify.
 #endif
 }
 
 } }  // namespace v8::internal