Transient test error in simplify/tests/test_hyperexpand.py

[tom-pytel]

Recently a commit which had nothing to do with this functionality failed for me with:

sympy/simplify/tests/test_hyperexpand.py:test_partial_simp
...
sympy.polys.polyerrors.PolynomialDivisionFailed: couldn't reduce degree in a polynomial division
algorithm when dividing [EX(2500), EX(0)] by [EX((29 - 420*I)*(29 + 420*I)/177241)]. This can
happen when it's not possible to detect zero in the coefficient domain. The domain of computation
is EX. You may want to use a different simplification algorithm. Note that in general it's not possible
to guarantee to detect zero in this domain.

Running the test again with no changes succeeded. Is this a randomized test which just happened to catch a bug or an invalid generated input?

[jksuom]

This looks like the same issue as here.

[tom-pytel]

This looks like the same issue as here.

So it is a known issue, in which case apart from that is it a good idea to have:

def test_partial_simp():
    # First test that hypergeometric function formulae work.
    a, b, c, d, e = (randcplx() for _ in range(5))

in what should in theory be a deterministic test (since it can sometimes trigger this issue)?