[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:  infoneeded
              Priority:  low         |        Milestone:
             Component:  Compiler    |          Version:  7.6.3
  (Type checker)                     |         Keywords:
            Resolution:              |     Architecture:  Unknown/Multiple
      Operating System:  Linux       |       Difficulty:  Unknown
       Type of failure:  GHC         |       Blocked By:
  rejects valid program              |  Related Tickets:
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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Changes (by thomie):

 * status:  new => infoneeded


Comment:

 nushio: could you please attach a testcase for the testsuite. The github
 link you posted seems to be missing some pieces. Thanks!

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8447#comment:5>
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