[GHC] #13074: Printing ~

[GHC]

#13074: Printing ~
-------------------------------------+-------------------------------------
           Reporter:  sgschlesinger  |             Owner:
               Type:  bug            |            Status:  new
           Priority:  low            |         Milestone:
          Component:  Compiler       |           Version:  8.0.1
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  None/Unknown
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
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 {{{#!

 class Relation (r :: x -> x -> Type)

 instance Relation (~)

 }}}

 /home/samuel/Work/research/program/relations/src/Hmm.hs:35:19: error:ghc:
 panic! (the 'impossible' happened)
   (GHC version 8.0.1 for x86_64-unknown-linux):
         print_equality ~

 Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug

 This clearly isn't a terribly important bug, but I figured I'd leave it
 here as that was the request given by the error message. It's not code
 that should compile, but it shouldn't panic!.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13074>
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