Fix no error message seg fault

[BA8F0D39]

For example: matrix addition

let dims = arrayfire::Dim4::new(&[4,4,1,1]);
let a = arrayfire::randu::<f32>(dims);
let sa =  arrayfire::sparse_from_dense(&a ,arrayfire::SparseFormat::CSR);
let b = arrayfire::randu::<f32>(dims);
let sb = arrayfire::sparse_from_dense(&b ,arrayfire::SparseFormat::CSR);
let c = sb.clone() + sa.clone();
arrayfire::af_print!("Random matrix", c);

Results in a segmentation fault

[9prady9]

@BA8F0D39 Can you please share the following

• Rust version
• ArrayFire binary installation version
• Rust wrapper Version
• OS

[9prady9]

A quick update, I was able to reproduce it. I am looking into if this is lack of feature or something else. Either way, some sort of error message should have been printed instead of silent seg fault.

Nevertheless, the info requested in #211 (comment) would be useful.

[9prady9]

One thing is sure, this operation (sparse + sparse addition) is not supported 3.6.4 version of ArrayFire library which is what you seem to be using - need your confirmation on that front. Latest development branch - master - has this feature and it should be automatically available in the wrapper when our next ArrayFire release is made.

Having said, I will look into this no message seg fault however, thanks for reporting it.

[9prady9]

@BA8F0D39 I have renamed the issue to reflect the actual issue. With the fix I made in #212 you should a proper error message such as the following for your example using ArrayFire-upstream-version 3.6.4

thread 'main' panicked at 'Error message: Unsupported operation/parameter option
Last error: No Last Error', src/error.rs:40:14
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace.

[BA8F0D39]

Thanks.
I'll wait for the new arrayfire version for rust.