Repeated call of sTriangulation freezes

[kitchenknif]

Running this code seems to randomly hang after ~3000 iterations, and I have been unable to deduce why. Using quadrature points from here.

import time
import numpy as np
import stripy

def get_lebedev_quadrature(order=29):
    phi, theta, weights = [], [], []
    with open("lebedev_{:03d}.txt".format(order), "r") as f:
        lines = f.readlines()
        for line in lines:
            ph, th, w = line.split()
            phi.append(float(ph) * np.pi / 180 + np.pi)
            theta.append(float(th) * np.pi / 180)
            weights.append(float(w))

    return np.asarray(phi), np.asarray(theta), np.asarray(weights)

if __name__ == "__main__":
    phi, theta, weights = get_lebedev_quadrature(29)
    for i in range(10000):
        a = time.time()
        tri = stripy.sTriangulation(lons=phi - np.pi, lats=-theta + np.pi / 2, permute=True)
        b = time.time() - a
        print(i, b)

lebedev_029.txt