[GHC] #14390: Panic when defining an instance for (~~) [ppr_equality: homogeneity]

[GHC]

#14390: Panic when defining an instance for (~~) [ppr_equality: homogeneity]
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        Reporter:  RyanGlScott       |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.2.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  crash or panic                     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by simonpj):

 >  We should probably give a similar error as for when one attempts to
 define an instance for (~):

 Yes please!

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14390#comment:1>
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