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

Ketil Malde ketil at
Wed Nov 9 05:17:53 EST 2005

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
>  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 


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