Incompatible sizes on AMD64

[Simon Marlow]

Juliusz Chroboczek wrote:
> When compiling Darcs on AMD64, I get a worrying sounding warning about
> incompatible datasizes from the C compiler.  I've reduced the Darcs
> code to what I believe is a minimal example (at any rate, removing a
> single clause anywhere makes the warning go away).
> 
> Compiling the attached gives
> 
>   $ ghc -c -O -keep-hc-files Bug.hs
>   Bug.hc: In function ‘s2iP_ret’:
>   Bug.hc:400: warning: cast to pointer from integer of different size
> 
> Compiling with ``-fvia-c'' instead of ``-O'' does not yield the
> warning.  This is GHC 6.4.1, as provided in Ian's 6.4.1-1 Debian
> package.

Thanks, a good bug, now fixed.  GHC was mis-compiling chr#, but it looks
to be harmless.

Cheers,
	Simon