Simon Marlow wrote:
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"
So cost-centre stacks are not produced for the original program written
by the user, but for the intermediate program after optimisation. I
understand that you want to profile the optimised version, but the fact
that your profile does not quite match your program can be confusing.
For debugging, however, I think that it is clear that you want your
debugging information (cost centre stacks) to match your program, even
if it costs you some performance.
Ciao,
Olaf
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