Hi, I haven't been able to pin point it exactly but following script: import matplotlib.pyplot as plt import matplotlib.tri as tri import numpy as np from numpy.random import uniform, seed
seed(0) npts = 200 x = uniform(-2,2,npts) y = uniform(-2,2,npts) z = x*np.exp(-x**2-y**2) y[1:3] = x[0] # 4 or more duplicate points make tricontour hang!!! x[1:3] = y[0] triang = tri.Triangulation(x, y) plt.tricontour(x, y, z, 15, linewidths=0.5, colors='k') plt.show() causes infinite loop in _tri.so. It happens in matplotlib-1.1.0 as well as git HEAD. I understand that my input is not exactly valid, but I'd rather see MPL die than occupy my box for eternity ;) Best regards, Kacper
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