message: Use int64 to avoid overflow
diff: @@ -37,7 +37,7 @@ __global__ void SparseToDenseKernel(
  const Index* __restrict__ dims, const int ndims, T* __restrict__ dense) {
  GPU_1D_KERNEL_LOOP(thread_idx, nnz) {
  eigen_assert(ndims >= 1);
  - Index output_idx = indices[thread_idx * ndims + ndims - 1];
  + int64 output_idx = indices[thread_idx * ndims + ndims - 1];
  Index strides = 1;
  for (int i = ndims - 2; i >= 0; i--) {
  strides *= dims[i + 1];
  