Python 3.10 kwarg peephole rewrite failing in valid case (breaks mainline)

Reporting a bug

• I have tried using the latest released version of Numba (most recent is visible in the change log (https://github.com/numba/numba/blob/main/CHANGE_LOG).
• I have included a self contained code sample to reproduce the problem. i.e. it’s possible to run as ‘python bug.py’.

This breaks on mainline and is a blocking issue for 0.56.

from numba import njit, objmode

def func(*args):
    pass

@njit
def log(*args):
    with objmode():
        func(*args)

log()

the above reproducer is extracted from the failing tests found by running on Python 3.10:

./runtests.py numba.tests.test_ndarray_subclasses

[njriasan]

@stuartarchibald I found the source of the issue. Opening a PR.

[stuartarchibald]

Thanks for promptly taking a look/opening a patch @njriasan, much appreciated.