[GHC] #12616: type synonyms confuse generalized newtype deriving role checking

[GHC]

#12616: type synonyms confuse generalized newtype deriving role checking
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        Reporter:  daviddarais       |                Owner:  goldfire
            Type:  bug               |               Status:  closed
        Priority:  low               |            Milestone:  8.0.2
       Component:  Compiler          |              Version:  8.0.1
      Resolution:  fixed             |             Keywords:  generalized
                                     |  newtype deriving roles rankntypes
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  GHC rejects       |            Test Case:
  valid program                      |  deriving/should_compile/T12616
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by bgamari):

 * status:  merge => closed
 * resolution:   => fixed


Comment:

 This was merged to `ghc-8.0` as c93ad554c9f9788b3e2ec45fa4d0131101721536.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12616#comment:5>
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