[GHC] #10263: Role annotation should never be ambiguous

[GHC]

#10263: Role annotation should never be ambiguous
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        Reporter:  ezyang            |                   Owner:  goldfire
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:
       Component:  Compiler (Type    |                 Version:  7.11
  checker)                           |                Keywords:
      Resolution:                    |            Architecture:
Operating System:  Unknown/Multiple  |  Unknown/Multiple
 Type of failure:  GHC rejects       |               Test Case:
  valid program                      |                Blocking:
      Blocked By:                    |  Differential Revisions:
 Related Tickets:                    |
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Changes (by simonpj):

 * owner:   => goldfire


Comment:

 You are quite right. I have not looked into how role annotations are
 renamed, but presumably they are rather like signatures.  For those we use
 `RnEnv.lookupSigOccRn`.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10263#comment:1>
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