Deriving regression or bad code?
ronwalf at volus.net
Mon Apr 12 06:08:53 EDT 2010
I was getting a similar error with standalone deriving (already
attached to that bug), but I didn't try it through-out. I'll let you
know how it goes.
On Mon, Apr 12, 2010 at 6:01 AM, Simon Peyton-Jones
<simonpj at microsoft.com> wrote:
> It's really a bug. I've fixed it in my tree, but I'm at 2.8 and don't have time to validate etc. So I'm doubtful that I'll be in time to get a fix into 6.12.1, alas.
> Well, maybe I can build a patch and send it to Simon/Ian for testing. I'll try to do that if it's important to you.
> it's bit of an exotic case because of the higher-kindedness so I don't think it'll bite too man people
> There's a good workaround: use "standalone deriving".
> | -----Original Message-----
> | From: glasgow-haskell-users-bounces at haskell.org [mailto:glasgow-haskell-
> | users-bounces at haskell.org] On Behalf Of Ron Alford
> | Sent: 10 April 2010 22:33
> | To: glasgow-haskell-users
> | Subject: Re: Deriving regression or bad code?
> | Just for fun, I tried it on 220.127.116.1100330 with the same result.
> | Does anyone have a workaround? Otherwise I need to revert to 6.10.
> | -Ron
> | On Thu, Apr 8, 2010 at 10:35 AM, Ron Alford <ronwalf at volus.net> wrote:
> | > At Igloo's suggestion, it's now a ticket:
> | > http://hackage.haskell.org/trac/ghc/ticket/3965
> | >
> | > -Ron
> | >
> | > On Thu, Apr 8, 2010 at 1:39 AM, Ron Alford <ronwalf at volus.net> wrote:
> | >> I've attached the simplest example of my code that used to compile in
> | >> GHC 6.10 now gives the error in GHC 6.12.1:
> | > ...
> | >
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