calling a __host__ function from a __host__ __device__ function is not allowed

[hygxy]

this method is annotated with the flag "__host__ __device__ ", which indicates that it can be called both from host and device. However, (how)is it guaranteed that the calls to Eigen methods within it(eig.computeDirect, eig.eigenvalues, values.asDiagonal, eig.eigenvectors().inverse), can be called both from host and device as well?

I open this issue because I encountered the following error:

terminate called after throwing an instance of 'thrust::system::system_error'
what():  for_each: failed to synchronize: cudaErrorIllegalAddress: an illegal memory access was encountered

Through debugging I find that the code snippets which cause the error are following:

if (cudaSuccess != status)
  {
    if (THRUST_IS_HOST_CODE) {
      #if THRUST_INCLUDE_HOST_CODE
        throw thrust::system_error(status, thrust::cuda_category(), msg);
      #endif