If the base object isn't poly proto, we should still use OPC set instead of PrototypeAccessChain 
https://bugs.webkit.org/show_bug.cgi?id=177721
Summary If the base object isn't poly proto, we should still use OPC set instead of P...
Saam Barati
Reported 2017-10-01 10:44:58 PDT
We can make this work if we always transition the structure during a prototype change. This is sort of weird in the case of poly proto, since it doesn't really need a transition, but it's probably rare enough that we don't care.
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