[GHC] #12051: -.-> is accepted as a data constructor

12 May 2016

      #12051: -.-> is accepted as a data constructor
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           Reporter:  mpickering     |             Owner:
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:
          Component:  Compiler       |           Version:  7.10.3
           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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 {{{
 data A = (-.->) Int
 }}}

 Is accepted by GHC without any complaints but `-.->` is not a valid data
 constructor as it doesn't start with a `:`.

 Anyone have any ideas about what is going on here?

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Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12051
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