Hello, I encountered the error "Segmentation fault (core dumped)" during a rather standard multiplication, without excessive memory us. This looks likes a bug to me? I am using Python 2.5, Numpy 1.0.4 under Ubuntu 7.10.
Here is what I am doing: i have two arrays, points1 and points2. points1.shape=(n,k) points2.shape=(m,k) The problem only happens if n or m (or both) are 1. The arrays are then still 2-dimensional. k is usually in the order of 60. The code: p1Mat=asmatrix(points1) p2Mat=asmatrix(points2).T ab=p1Mat*p2Mat At the third line, python crashes back to terminal with the text "Segmentation fault (core dumped)" Tracing further the error happens at line 106 of numpy/core/defmatrix.py If I understand correctly, the __mul__ method of p1Mat calls N.dot(self, asmatrix(other)) and the problem occurs in asmatrix(other) , i.e. before actual multiplication is done. To be more precise, at some point the code calls __array_finalize__ twice, nested, and the error happens on the second return from it. I am not 100% sure what is done here, but it looks as if the asmatrix command I gave myself is somehow conflicting with the asmatrix command given by __mul__ I have replaced my code with: p1Mat=sp.matrix(points1) p2Mat=sp.matrix(points2).T ab=p1Mat*p2Mat and this works fine. I hope this information is useful to someone? Marius
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