Hi, On Eigen's latest stable version (3.2.8), I am encountering a signed integer overflow when using Sparse / Sparse products with pruning, namely on the following line: double ratioColRes = double(estimated_nnz_prod)/double(lhs.rows()*rhs.cols()); And then the problem reported at the exectution: SparseSparseProductWithPruning.h:51:68: runtime error: signed integer overflow: 56224 * 56224 cannot be represented in type 'int [3]' Now, I don't know what this 'int [3]' means, but this product would fit in a 'long long' or a double, so I guess the overflow could be avoided.
Thanks for the report, I've simply moved the conversion to double before the product. devel: https://bitbucket.org/eigen/eigen/commits/caa3c3993517/ 3.2: https://bitbucket.org/eigen/eigen/commits/282ed0ab80a9/
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