[issue43683] Handle generator (and coroutine) state in the bytecode.

[Damien George]

Damien George <damien.p.george at gmail.com> added the comment:

It looks like this change introduced a subtle, and maybe intended (?), behavioural change.

Consider (from MicroPython's test suite):

def f():
    n = 0 
    while True:
        n = yield n + 1 
        print(n)

g = f()
try:
    g.send(1)
except TypeError:
    print("caught")

print(g.send(None))
print(g.send(100))
print(g.send(200))

This used to work prior to commit b37181e69209746adc2119c471599a1ea5faa6c8.  But after that commit it fails on the print(g.send(None)) because the generator is now stopped.

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nosy: +dpgeorge

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<https://bugs.python.org/issue43683>
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