[resending to capture this on the codereview]
The call sequence is:
JSReceiver::HasElement
JSObject::GetElementAttributeWithReceiver
JSObject::GetElementAttributeWithoutInterceptor
GetElementAttributeWithoutInterceptor() does two things:
1. Check if the index is present in the element backing store
2. If not, check if this is a string object with a character at that index
The call sequence for "'0' in o" is:
JSReceiver::HasProperty
JSObject::GetPropertyAttribute
JSObject::GetPropertyAttributeWithReceiver
JSObject::GetElementAttributeWithReceiver
JSObject::GetElementAttributeWithoutInterceptor
I think I shot myself in the foot here by removing the HandleScope from
GetElementAttributeWithoutInterceptor in the same change, which obscures the
fact that its call to IsStringObjectWithCharacterAt remains unchanged.
https://codereview.chromium.org/12328064/
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