[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:  closed
        Priority:  normal            |            Milestone:  7.10.1
       Component:  Compiler (Type    |              Version:  7.9
  checker)                           |
      Resolution:  fixed             |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Compile-time      |            Test Case:
  crash                              |  typecheck/should_fail/T9739
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
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Comment (by Simon Peyton Jones <simonpj@…>):

 In [changeset:"48e06346805ab882a54088e01e5224111182f5df/ghc" 48e0634/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="48e06346805ab882a54088e01e5224111182f5df"
 Revert "Allow as-patterns in pattern synonym declarations."

 I'm reverting this until we agree a design.
 See comment:5 in Trac #9793.

 Incidentally the reference to Trac #9739 in the reverted
 patch is bogus; it shold have said #9793.

 This reverts commit 44640af7afa1a01ff2e2357f7c1436b4804866fc.
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9739#comment:14>
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