indexing error in futhark?

[melsman]

Problems with mystery2.apl.bug

[athas]

This is strictly not an error. Futhark is complaining that there is an array bounds check that it cannot get rid of, and bounds checking inside parallel sections is not supported. I think the easiest solution is to pass --unsafe to tail2futhark, which will eliminate all bounds checking in generated Futhark code.