Bugfix for latest SciPy release #76
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PTNobel
approved these changes
Dec 22, 2025
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In scipy 1.14+, scipy.sparse.bmat() returns a sparse array (e.g., coo_array) instead of a sparse matrix (coo_matrix) when any of the input blocks are sparse arrays. The diffcp C++ bindings (_diffcp.M_operator) specifically expect scipy.sparse.csc_matrix. This change was breaking tests in the cvxpy CI.