[GHC] #14148: initTc: unsolved constraints

[GHC]

#14148: initTc: unsolved constraints
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           Reporter:  robertpergl     |             Owner:  (none)
               Type:  bug             |            Status:  new
           Priority:  normal          |         Milestone:
          Component:  Compiler        |           Version:  8.2.1
           Keywords:                  |  Operating System:  Linux
       Architecture:  x86_64 (amd64)  |   Type of failure:  Runtime crash
          Test Case:                  |        Blocked By:
           Blocking:                  |   Related Tickets:
Differential Rev(s):                  |         Wiki Page:
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 || ghc: panic! (the 'impossible' happened)
 ||   (GHC version 8.0.2 for x86_64-unknown-linux):
 ||      initTc: unsolved constraints
 ||   WC {wc_insol =
 ||         [W] ltail_ae2e :: t_ae2d[tau:1] (CHoleCan: ltail)
 ||         [W] lhead_ae2h :: t_ae2g[tau:1] (CHoleCan: lhead)}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14148>
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