the impossible happend again
Thanks for the bug report. I am investigating. In the meantime you
could change the declaration of ArgrC from a 'newtype' to an ordinary
'data' declaration. It then compiles fine for me.
Hope this helps
regards
Kevin
Volker Wysk writes:
> Hi.
>
>
> ghc -fallow-undecidable-instances -fglasgow-exts -fno-prune-tydecls -O2 \
> -c -o Arglib.o Arglib.hs
>
> panic! (the `impossible' happened):
> mkWWcpr: not a product
> g{-rku-}
> -> (g{-rku-},
> PrelMaybe.Either{-r8t,i-}
> ((t{-rkv-} -> tzq{-rkT-}) -> tzq{-rkT-})
> [Arglib.GenArgError{-r2p,x-}])
>
> Please report it as a compiler bug to [EMAIL PROTECTED]
>
RE: cvs 4.07 arithmetic errors in Integer arithmetic
> I am trying to fix some errors in the Integer arithmetic > Simon Marlow and I spotted. > > I just reinstalled cvs from scratch yesterday and build ghc-4.07 > from it. I then noticed that one of my programs resulted in > completely different output than it did with ghc-4.06 (or even > 4.07 from cvs a few weeks ago). > > I am pretty convinced that the ghc-4.06 output is correct and > the 4.07 output is **very** wrong. I am pretty sure the differences > are caused by changes in Integer arithmetic (again, I have not > noticed these problems with 4.07 and cvs a few weeks ago, so the > changes must have been recent.) If I were to guess the errors are > caused by changes to quot or gcd. There haven't been any changes to PrelNum.lhs (which is where quot, gcd etc. live) since 4.06. I can't think of any changes off the top of my head that may have caused this. Could you send us an example that shows up the difference? Cheers, Simon
Re: cvs 4.07 arithmetic errors in Integer arithmetic
> Finally I would like to know if there is a way to get my hands > on a cvs tree for 4.06 so that I can compare the two and see > what happens when I apply a fix to 4.07 against applying the > same fix for 4.06? cvs co -r ghc-4-06-branch will give you the 4.06 tree. cvs diff -r ghc-4-06-branch will give you the diffs between your current tree and ghc 4.06. `ghc-4-06-branch' includes any patches to the released GHC-4.06 since the initial release (eg, ghc-4-04-branch is GHC 4.04 pl1); `ghc-4-06' is the initially-released GHC 4.06. I believe in this case they're the same. HTH. --KW 8-) -- : Keith Wansbrough, MSc, BSc(Hons) (Auckland) ---: : PhD Student, Computer Laboratory, University of Cambridge, UK. : : Native of Antipodean Auckland, New Zealand: 174d47'E, 36d55'S. : : http://www.cl.cam.ac.uk/users/kw217/ mailto:[EMAIL PROTECTED] : ::
cvs 4.07 arithmetic errors in Integer arithmetic
Hi there, I am trying to fix some errors in the Integer arithmetic Simon Marlow and I spotted. I just reinstalled cvs from scratch yesterday and build ghc-4.07 from it. I then noticed that one of my programs resulted in completely different output than it did with ghc-4.06 (or even 4.07 from cvs a few weeks ago). I am pretty convinced that the ghc-4.06 output is correct and the 4.07 output is **very** wrong. I am pretty sure the differences are caused by changes in Integer arithmetic (again, I have not noticed these problems with 4.07 and cvs a few weeks ago, so the changes must have been recent.) If I were to guess the errors are caused by changes to quot or gcd. Unfortunately I have very limited time to spend on this. (I already spent more time on this than I had anticipated I would need.) Is there anybody who thinks that a *recent* change made by him could have led to the problems I noticed? I would appreciate suggestions from cvs hackers as to what is a good approach to locate the cause of the problem. Finally I would like to know if there is a way to get my hands on a cvs tree for 4.06 so that I can compare the two and see what happens when I apply a fix to 4.07 against applying the same fix for 4.06? Regards, Marc van Dongen -- Marc van Dongen, CS Dept | phone: +353 21 903578 University College Cork, NUIC | Fax: +353 21 903113 College Road, Cork, Ireland | Email: [EMAIL PROTECTED]
