[GHC] #11010: Untouchable type, pattern synonyms

GHC ghc-devs at haskell.org
Wed Oct 28 12:17:43 UTC 2015


#11010: Untouchable type, pattern synonyms
-------------------------------------+-------------------------------------
        Reporter:  Iceland_jack      |                Owner:
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  7.10.2
      Resolution:  fixed             |             Keywords:
Operating System:  Linux             |         Architecture:  x86
 Type of failure:  None/Unknown      |            Test Case:
                                     |  patsyn/should_fail/T11010
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------
Changes (by simonpj):

 * testcase:   => patsyn/should_fail/T11010
 * status:  new => closed
 * resolution:   => fixed


Comment:

 Now we get
 {{{
 T11010.hs:8:1: error:
      The 'required' context ‘a ~ Int’
        mentions existential type variable ‘a’

 T11010.hs:16:1: error:
      The 'required' context ‘a ~ Int’
        mentions existential type variable ‘a’
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11010#comment:6>
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