[CVE-2018-8381] Edge - Child Case of type confusion with EntrySimpleObjectSlotGetter
[CVE-2018-8381] Edge - Child Case of type confusion with EntrySimpleObjectSlotGetter

Marshalling should not be re-entrant. But due to proxy in the prototype chain - we could have prototype trap invoked and things can get worse from there.
We had put no-reentrancy macro in there but that protect us on RS3 and up.
In order to fix this, we need to check if the current object is proxy or not - in that case break the chain.

Microsoft/ChakraCore,Microsoft/ChakraCore,Microsoft/ChakraCore,Microsoft/ChakraCore,Microsoft/ChakraCore,Microsoft/ChakraCore