Failure of Espresso test-suite with x and y nan location mismatch

[laraPPr]

We have seen the following error when running on a local optimised build of Espresso on a skylake cluster at Ghent University. The nodes are running on RHEL9 operating system.

Executing sanity checks...

Traceback (most recent call last):
  File "/kyukon/scratch/gent/461/vsc46128/EESSI/test-suite/stage/skitty/skitty/default/EESSI_ESPRESSO_P3M_IONIC_CRYSTALS_e0bb4712/madelung.py", line 115, in <module>
    np.testing.assert_allclose(energy, ref_energy, atol=atol_energy, rtol=rtol_energy)
  File "/apps/gent/RHEL9/skylake-ib/software/SciPy-bundle/2023.11-gfbf-2023b/lib/python3.11/site-packages/numpy/testing/_private/utils.py", line 1504, in assert_allclose
    assert_array_compare(compare, actual, desired, err_msg=str(err_msg),
  File "/apps/gent/RHEL9/skylake-ib/software/Python/3.11.5-GCCcore-13.2.0/lib/python3.11/contextlib.py", line 81, in inner
    return func(*args, **kwds)
           ^^^^^^^^^^^^^^^^^^^
  File "/apps/gent/RHEL9/skylake-ib/software/SciPy-bundle/2023.11-gfbf-2023b/lib/python3.11/site-packages/numpy/testing/_private/utils.py", line 718, in assert_array_compare
    flagged = func_assert_same_pos(x, y, func=isnan, hasval='nan')
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/apps/gent/RHEL9/skylake-ib/software/SciPy-bundle/2023.11-gfbf-2023b/lib/python3.11/site-packages/numpy/testing/_private/utils.py", line 688, in func_assert_same_pos
    raise AssertionError(msg)
AssertionError:
Not equal to tolerance rtol=5e-06, atol=1e-12

x and y nan location mismatch:
x: array(nan)
y: array(-1.747565)