[GHC] #15400: Parse error on input ‘*’

[GHC]

#15400: Parse error on input ‘*’
-------------------------------------+-------------------------------------
           Reporter:  Bodigrim       |             Owner:  (none)
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:  8.6.1
          Component:  Compiler       |           Version:  8.4.3
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  GHC rejects
  Unknown/Multiple                   |  valid program
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
-------------------------------------+-------------------------------------
 Both GHC 8.6.1-alpha1 and 8.6.1-alpha2 fail to build `numtype-dk` package,
 while GHC 8.4.3 and HEAD work fine.
 {{{
 Configuring numtype-dk-0.5.0.1...
 Preprocessing library for numtype-dk-0.5.0.1..
 Building library for numtype-dk-0.5.0.1..
 Numeric/NumType/DK/Integers.hs:38:29: error:
     parse error on input ‘*’
    |
 38 |   type (+), type (-), type (*), type (/), type (^),
    |
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15400>
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