[nhc-bugs] EnumFromThen

[Malcolm Wallace]

hanatani at mbg.nifty.com wrote:

> I found a bug in nhc98-1.18.

Yes indeed!  I wonder how that one escaped attention for so long...

> $ diff src/prelude/Prelude/Enum_Integer.hs src/prelude/Prelude/Enum_Integer.hs
> 14c14
> <   enumFromThen x y = x : enumFromThen y (2*y-x)
> ---
> >   enumFromThen x y = x : enumFromThen y (2*y+x)

Your patch format is the wrong way round, but I get the idea.
Thanks!

Regards,
    Malcolm