[GHC] #12549: Panic on ":t datatypeName"

[GHC]

#12549: Panic on ":t datatypeName"
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        Reporter:  johnleo       |                Owner:
            Type:  bug           |               Status:  new
        Priority:  normal        |            Milestone:
       Component:  Compiler      |              Version:  8.0.1
      Resolution:                |             Keywords:
Operating System:  MacOS X       |         Architecture:  x86_64 (amd64)
 Type of failure:  None/Unknown  |            Test Case:
      Blocked By:                |             Blocking:
 Related Tickets:                |  Differential Rev(s):
       Wiki Page:                |
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Comment (by johnleo):

 My .ghci file, in case it is relevant:

 {{{
 :set -fprint-explicit-foralls
 :set -fprint-explicit-kinds
 :set -fprint-unicode-syntax
 :set -XUnicodeSyntax
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12549#comment:1>
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