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This test currently fails on py3.12 as follows:

        def test_deepreplace_bytes():
            def f(): pass
            g = lambda: None # non-picklable func
            with raises((pickle.PicklingError, AttributeError), match="Can't pickle "):
    >           pickle.dumps(g, pickle.HIGHEST_PROTOCOL)
    E           AttributeError: Can't get local object 'test_deepreplace_bytes.<locals>.<lambda>'

    golang/golang_str_test.py:2390: AttributeError

    During handling of the above exception, another exception occurred:

        def test_deepreplace_bytes():
            def f(): pass
            g = lambda: None # non-picklable func
    >       with raises((pickle.PicklingError, AttributeError), match="Can't pickle "):
    E       AssertionError: Regex pattern did not match.
    E        Regex: "Can't pickle "
    E        Input: "Can't get local object 'test_deepreplace_bytes.<locals>.<lambda>'"

What happens here is that "cannot pickle lambda" error changed from
py3.11 to py3.12:

    ---- 8< ---- (x.py)
    import pickle

    def fff():
        g = lambda: None
        pickle.dumps(g, pickle.HIGHEST_PROTOCOL)

    fff()
    ---- 8< ----

    kirr@deca:~$ python3.11 x.py
    ...
    AttributeError: Can't pickle local object 'fff.<locals>.<lambda>'

    kirr@deca:~$ python3.12 x.py
    ...
    AttributeError: Can't get local object 'fff.<locals>.<lambda>'

-> Adjust the test to account for that.

/cc @Daetalus
/reviewed-by @jerome, @tomo
/reviewed-on nexedi/pygolang!35