[issue21591] "exec(a, b, c)" not the same as "exec a in b, c" in nested functions

[Dirkjan Ochtman]

Dirkjan Ochtman added the comment:

I can take a look at the py failure next week.

Keeping the run-time compatibility code seems sensible, but I'm not sure if it'd fix the py test?

I don't think reverting the changes at this point is warranted.

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<http://bugs.python.org/issue21591>
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