[GHC] #5333: Arrow command combinators and infixr cause the desugarer to fail

[GHC]

#5333: Arrow command combinators and infixr cause the desugarer to fail
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              Reporter:  peteg       |            Owner:  ross
                  Type:  bug         |           Status:  new
              Priority:  low         |        Milestone:  7.10.1
             Component:  Compiler    |          Version:  7.0.3
  (Parser)                           |         Keywords:
            Resolution:              |     Architecture:  Unknown/Multiple
      Operating System:              |       Difficulty:  Unknown
  Unknown/Multiple                   |       Blocked By:
       Type of failure:  GHC         |  Related Tickets:
  rejects valid program              |
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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Comment (by thomie):

 The testcase from the description compiles fine with HEAD
 (ghc-7.9.20141125).

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/5333#comment:12>
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