[GHC] #11151: T3064 regresses with wildcard refactor

[GHC]

#11151: T3064 regresses with wildcard refactor
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        Reporter:  bgamari           |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  7.10.2
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  performance bug                    |            Test Case:  T3064
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by simonpj):

 Perhaps add the before-and-after commit ids, so it's easy to compare when
 investigating?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11151#comment:2>
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