SERIOUS BUG! Invalid returned values on Mac 13.3 with 0.15.3

[ianhbell]

More debugging is needed to figure out the precise culprit, but on Mac OS 13.3, invalid values are returned from this code block:

import teqp
import numpy as np
print(teqp.__version__)

Tc_K = [300]
pc_Pa = [4e6]
acentric = [0.01]
z = np.array([1.0])
model = teqp.canonical_PR(Tc_K, pc_Pa, acentric)
print(model.get_Ar06n(300.0, 300.0, z))

yielding

0.15.4dev
[0. 0. 0. 0. 0. 0. 0.]

What combination of things are required to get this result is unclear, as it works fine on windows and linux with version 0.15.3