[GHC] #7039: Panic due 'instance Foo a => Bar a => Baz a' style declarations

[GHC]

#7039: Panic due 'instance Foo a => Bar a => Baz a' style declarations
---------------------------------+------------------------------------------
  Reporter:  ksf                 |          Owner:                  
      Type:  bug                 |         Status:  closed          
  Priority:  normal              |      Milestone:                  
 Component:  Compiler            |        Version:  7.4.2           
Resolution:  duplicate           |       Keywords:                  
        Os:  Unknown/Multiple    |   Architecture:  Unknown/Multiple
   Failure:  Compile-time crash  |     Difficulty:  Unknown         
  Testcase:                      |      Blockedby:                  
  Blocking:                      |        Related:                  
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Changes (by simonpj):

  * status:  new => closed
  * difficulty:  => Unknown
  * resolution:  => duplicate


Comment:

 Yes it is a dup, and indeed fixed:
 {{{
 T7039.hs:5:10: Malformed instance: Show a => Num a => Foo a
 }}}

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7039#comment:2>
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