I reopened the bug, since I found slight changes to the file were able to reproduce the bug in recent versions of ghc-6.9. I also can't get the -S compilation step to work with the new file, unless I'm missing a step. -Ron Alford On Mon, Jul 21, 2008 at 3:32 AM, Ron Alford wrote:

Oops, already posted the bug: http://hackage.haskell.org/trac/ghc/ticket/2456

On Mon, Jul 21, 2008 at 3:29 AM, Austin Seipp wrote:

...

Status update: after checking out the latest HEAD and building it, the above error does not occur:

$ ~/ghc-head/bin/ghc --version The Glorious Glasgow Haskell Compilation System, version 6.9.20080720 $ ~/ghc-head/bin/ghc --make DerivingError.hs

<no location info>: Warning: -fallow-overlapping-instances is deprecated: Use the OverlappingInstances language instead [1 of 1] Compiling DerivingError ( DerivingError.hs, DerivingError.o ) $

However, this doesn't exactly help your immediate problem, and it likely won't until 6.10.1 is released, as 6.8.3 is going to be the last release of the 6.8 branch.

Truly sorry I couldn't have helped you more.

Austin _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe