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Since `std::equal_to::operator()` is not a device function, it fails on GPU. On my device, I seem to get a silent crash in the kernel (no reported error, but the kernel does not complete). Replacing this with a portable version enables comparisons on device. Addresses #2292 - would need to be cherry-picked. The 3.3 branch also requires adding `EIGEN_DEVICE_FUNC` in `BooleanRedux.h` to get fully working.
Eigen is a C++ template library for linear algebra: matrices, vectors, numerical solvers, and related algorithms.
For more information go to http://eigen.tuxfamily.org/.
For pull request, bug reports, and feature requests, go to https://gitlab.com/libeigen/eigen.
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