[GHC] #11348: Local open type families instances ignored during type checking

[GHC]

#11348: Local open type families instances ignored during type checking
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        Reporter:  alexvieth         |                Owner:
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1-rc1
      Resolution:  fixed             |             Keywords:  TypeFamilies
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  GHC rejects       |            Test Case:
  valid program                      |  typecheck/should_compile/T11348
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D1762
       Wiki Page:                    |
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Comment (by alexvieth):

 Happy to help! I'm glad to see this all wrapped up.

 > If that was fun for you, the next step is to support ​induction
 recursion.

 Is there a trac ticket for this?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11348#comment:18>
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