[GHC] #7611: Rewrite rules application prevented by type variable application (map id vs. map (\x -> x))

[GHC]

#7611: Rewrite rules application prevented by type variable application (map id
vs. map (\x -> x))
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        Reporter:  nomeata           |                Owner:
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  7.6.2
      Resolution:  fixed             |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Runtime           |  Unknown/Multiple
  performance bug                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by Joachim Breitner <mail@…>):

 In [changeset:"97b47d277d6b0ced3ce73175f78b23ecff84cfa3/ghc"
 97b47d27/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="97b47d277d6b0ced3ce73175f78b23ecff84cfa3"
 Add test case for #7611

 basically using the machinery from the test case of #2110.
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7611#comment:12>
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