[GHC] #12242: panic with complicated type/kind/class expressions

[GHC]

#12242: panic with complicated type/kind/class expressions
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        Reporter:  Ashley Yakeley    |                Owner:  simonpj
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Linux             |         Architecture:  x86_64
 Type of failure:  GHC rejects       |  (amd64)
  valid program                      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by Simon Peyton Jones <simonpj@…>):

 In [changeset:"24194a6aed950ed4c3733e3c582abf8a15d98ffd/ghc"
 24194a6a/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="24194a6aed950ed4c3733e3c582abf8a15d98ffd"
 Fix pretty-printer for IfaceCo

 As Trac #12242 showed, there was a missing case in
 the pretty printer for IfaceCo. I've refactored it
 so that the pattern-match ovelap checker will spot
 it next time.
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12242#comment:3>
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