[SciPy-User] linalg.eigh hangs only after importing sparse module

[Dan Yamins]

Your matrix X  is not symmetric.
>

This is not the problem.   (Even if that were the problem, it wouldn't
cause a hang -- docs say "no error will be reported but results will be
wrong".)

In fact, the same hang happens on the installation which originally had
this problem if you replace X with X = np.dot(X, X.T) so that the matrix is
symmetric.
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