Proposal: Improved error message of "Error in array index"

[Ketil Malde]

Simon Marlow wrote:

>Hmm yes, this is indeed rather unhelpful.  I can explain why it happens,
>though.  The compiler has lifted out the error case into a top-level
>binding:
>
>  x = error "Error in array index"
>  
>
Would the compiler be less agressive with this if I turn off 
optimization?   I usually use optimization with profiling as well, but 
could of course turn it off if it would result in more useful stack 
backtraces.

-k