[GHC] #14740: Unboxed tuple allowed in context: ((##)) => ()

[GHC]

#14740: Unboxed tuple allowed in context: ((##)) => ()
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           Reporter:  Iceland_jack   |             Owner:  (none)
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:
          Component:  Compiler       |           Version:  8.2.2
  (Parser)                           |
           Keywords:  UnboxedTuples  |  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 have a feeling this is not intended

 {{{
 GHCi, version 8.5.20180128: http://www.haskell.org/ghc/  :? for help
 Prelude> :set -XUnboxedTuples
 Prelude> let x :: ((##)) => (); x = ()
 Prelude> :t x
 x :: ()
 Prelude> x
 ()
 Prelude>
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14740>
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