[GHC] #12041: GHC panics on "print_equality ~"

[GHC]

#12041: GHC panics on "print_equality ~"
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        Reporter:  Iceland_jack      |                Owner:  simonpj
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.0.2
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by Simon Peyton Jones <simonpj@…>):

 In [changeset:"ad7f12260e227e849b815f4959df0f886ecbe807/ghc"
 ad7f1226/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="ad7f12260e227e849b815f4959df0f886ecbe807"
 Improve pretty-printing of equalities

 The previous pretty-printer didn't account for partially
 applied equalities, causing Trac #12041
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12041#comment:5>
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