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

[Terry J. Reedy]

Terry J. Reedy added the comment:

The exception appears to be intentional, though I do not know what a 
'qualified' exec would be. But since the tuple form is intended to mimic 3.x 
exec, and since a reduced version of your example

c = '''
def g():
    def f():
        if True:
            exec("", {}, {})
'''
compile(c, "<code>", "exec")

runs fine in 3.4, I agree that this appears to be a 2.7 compiler bug.

----------
nosy: +benjamin.peterson, brett.cannon, georg.brandl, ncoghlan, terry.reedy
stage:  -> needs patch

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