Pablo Galindo Salgado <pablog...@gmail.com> added the comment:

> The doc for exec says globals "must be a dictionary (and not a subclass of 
> dictionary)"

I agree with Terry, the moment you pass a dict subclass to exec you are out of 
contract. If any, we may need to sanitize the input to exec, although I don't 
think is worth paying the performance price for that.

> Some smart maintainer closed https://bugs.python.org/issue36220 as a 
> duplicate of this one.

I closed issue36220 as a duplicate. Paul, I don't know if you are being 
sarcastic here so I will assume that you are not but in case you are, I suggest 
you stop as this violates our CoC.

> Docs are full of mistakes and outdated information.

They are also full of contracts and as of today, what the docs document is what 
is considered the public API. 

In any case, my opinion is that LOAD_NAME and LOAD_GLOBAL should not pay the 
performance price to handle less-specific APIs just to support a very uncommon 
case (using dict subclasses as globals) that are also out of contract. For 
STORE_GLOBAL I feel less strongly about that, but I am still -1 on it.

----------

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