[GHC] #9739: GHC 7.8 chokes on recursive classes

[GHC]

#9739: GHC 7.8 chokes on recursive classes
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              Reporter:  bitonic     |            Owner:
                  Type:  bug         |           Status:  new
              Priority:  normal      |        Milestone:
             Component:  Compiler    |          Version:  7.9
  (Type checker)                     |         Keywords:
            Resolution:              |     Architecture:  Unknown/Multiple
      Operating System:              |       Difficulty:  Unknown
  Unknown/Multiple                   |       Blocked By:
       Type of failure:  Compile-    |  Related Tickets:
  time crash                         |
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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Comment (by bitonic):

 Actually, you don't need `MultiParamTypeClasses`:

 {{{#!hs
 module Foo where

 class Class3 a => Class1 a where

 class Class2 a where
   class2 :: (Class3 a) => b

 class (Class1 a, Class2 a) => Class3 a where
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9739#comment:3>
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