Re: [GHC] #8865: Cannot derive well-kinded instance of form ‘Category

GHC ghc-devs at haskell.org
Tue Mar 11 12:45:43 UTC 2014


#8865: Cannot derive well-kinded instance of form ‘Category
-------------------------------------------------+-------------------------
        Reporter:  adinapoli                     |            Owner:
            Type:  bug                           |           Status:  merge
        Priority:  normal                        |        Milestone:  7.8.1
       Component:  Compiler                      |          Version:
      Resolution:  fixed                         |  7.8.1-rc2
Operating System:  MacOS X                       |         Keywords:
 Type of failure:  GHC rejects valid program     |     Architecture:
       Test Case:                                |  x86_64 (amd64)
  deriving/should_compile/T8865                  |       Difficulty:
        Blocking:                                |  Unknown
                                                 |       Blocked By:
                                                 |  Related Tickets:
-------------------------------------------------+-------------------------
Changes (by simonpj):

 * testcase:   => deriving/should_compile/T8865


Comment:

 Yes, works in HEAD, and will do in 7.8.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8865#comment:12>
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