[GHC] #8447: A combination of type-level comparison and subtraction does not work for 0

[GHC]

#8447: A combination of type-level comparison and subtraction does not work for 0
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        Reporter:  nushio                     |            Owner:
            Type:  bug                        |           Status:  new
        Priority:  low                        |        Milestone:
       Component:  Compiler (Type checker)    |          Version:  7.6.3
      Resolution:                             |         Keywords:
Operating System:  Linux                      |     Architecture:
 Type of failure:  GHC rejects valid program  |  Unknown/Multiple
       Test Case:                             |       Difficulty:  Unknown
        Blocking:                             |       Blocked By:
                                              |  Related Tickets:
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Comment (by Iavor S. Diatchki <iavor.diatchki@…>):

 In [changeset:"cb0fd91a57014ce28edaa9dbf6e6d1fd2cc95875/ghc"]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="cb0fd91a57014ce28edaa9dbf6e6d1fd2cc95875"
 Improve documentation (Related to #8447)
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8447#comment:3>
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