[GHC] #13466: Ghci panics with type applications to unknown functions

[GHC]

#13466: Ghci panics with type applications to unknown functions
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           Reporter:  aspiwack       |             Owner:  (none)
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:
          Component:  GHCi           |           Version:  8.0.2
           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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 I haven't investigated further, but I stumbled upon the following:

 {{{
 Prelude> :set -XTypeApplications
 Prelude> :t nonexistant @[]
 ghc: panic! (the 'impossible' happened)
   (GHC version 8.0.2 for x86_64-unknown-linux):
         initTc: unsolved constraints
   WC {wc_insol =
         [W] nonexistant_a2YB :: t_a2YA[tau:3] (CHoleCan: nonexistant)}
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13466>
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