RE: GHC 7.0.1 rc1: Could not deduce (Typeable a) from the context (Typeable a, …)

[Simon Peyton-Jones]

Thank you!  I can reproduce it.  It is a truly egregious error.  It will be fixed.

Simon

|  -----Original Message-----
|  From: glasgow-haskell-users-bounces at haskell.org [mailto:glasgow-haskell-users-
|  bounces at haskell.org] On Behalf Of Malte Sommerkorn
|  Sent: 30 September 2010 15:55
|  To: Simon Peyton-Jones
|  Cc: glasgow-haskell-users at haskell.org
|  Subject: Re: GHC 7.0.1 rc1: Could not deduce (Typeable a) from the context (Typeable
|  a, …)
|  
|  Simon Peyton-Jones wrote:
|  > Oh dear, that really is quite a strange error message. Something is
|  > definitely wrong. Can you please make a ticket for it, and include
|  > instructions on how to reproduce it?
|  
|  Done: http://hackage.haskell.org/trac/ghc/ticket/4355
|  
|  > I gather that it depends on other packages that themselves needed changes,
|  > so reproduction might not be entirely easy?
|  
|  I've attached a module to the bug report that triggers the problem and only
|  depends on base and mtl, so that should be fairly easy to reproduce.
|  
|  Regards
|  Malte
|  
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