python-control 0.9.1 fails in test_nyquist_indent on aarch64 #687

[  132s] =================================== FAILURES ===================================
[  132s] _____________________________ test_nyquist_indent ______________________________
[  132s] 
[  132s]     def test_nyquist_indent():
[  132s]         # FBS Figure 10.10
[  132s]         s = ct.tf('s')
[  132s]         sys = 3 * (s+6)**2 / (s * (s+1)**2)
[  132s]         # poles: [-1, -1, 0]
[  132s]     
[  132s]         plt.figure();
[  132s]         count = ct.nyquist_plot(sys)
[  132s]         plt.title("Pole at origin; indent_radius=default")
[  132s]         assert _Z(sys) == count + _P(sys)
[  132s]     
[  132s]         # first value of default omega vector was 0.1, replaced by 0. for contour
[  132s]         # indent_radius is larger than 0.1 -> no extra quater circle around origin
[  132s]         count, contour = ct.nyquist_plot(sys, plot=False, indent_radius=.1007,
[  132s]                                          return_contour=True)
[  132s]         np.testing.assert_allclose(contour[0], .1007+0.j)
[  132s]         # second value of omega_vector is larger than indent_radius: not indented
[  132s] >       assert np.all(contour.real[2:] == 0.)
[  132s] E       AssertionError: assert False
[  132s] E        +  where False = <function all at 0xffff92ec1d30>(array([0.1001..., 0.        ]) == 0.0
[  132s] E        +    where <function all at 0xffff92ec1d30> = np.all
[  132s] E           +array([0.1001835 , 0.10017386, 0.10016404, 0.10015404, 0.10014385,\n
[  132s] E           +       0.10013347, 0.1001229 , 0.10011213, 0.10010116, 0.10008998,\n
[  132s] E           +       0.10007859, 0.10006699, 0.10005517, 0.10004313, 0.10003086,\n
[  132s] E           +       0.10001837, 0.10000564, 0.09999267, 0.09997946, 0.099966  ,\n
[  132s] E           +       0.09995229, 0.09993832, 0.09992409, 0.0999096 , 0.09989483,\n
[  132s] E           +       0.09987978, 0.09986445, 0.09984884, 0.09983293, 0.09981672,\n
[  132s] E           +       0.09980021, 0.09978339, 0.09976625, 0.09974879, 0.099731  ,\n...
[  132s] E           
[  132s] E           ...Full output truncated (195 lines hidden), use '-vv' to show)
[  132s] 
[  132s] control/tests/nyquist_test.py:202: AssertionError