Types with CudaArray elements cannot be saved to JLD because of pointer exception about cudart.jl

[timholy]

See https://github.com/JuliaLang/JLD.jl/blob/master/doc/jld.md#custom-serialization

[denizyuret]

Thanks Tim, the following three lines solved the problem:

    type _CudaArraySave; a::Array; end
    JLD.writeas(c::CudaArray) = _CudaArraySave(to_host(c))
    JLD.readas(d::_CudaArraySave) = CudaArray(d.a)

Do you want to put this in CUDArt? I was going to submit a pull request but I couldn't be sure if you wanted JLD to be a requirement for CUDArt. In either case, this issue can be closed.

[timholy]

If you can come up with a solution that exploits Requires.jl, do you think that would be better?