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

[Nick Coghlan]

Nick Coghlan added the comment:

Given that our test suite missed the regression originally, it would be
nice to have a test case that directly built an AST that relies on the
runtime check.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue21591>
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