[GHC] #5045: "panic! (the 'impossible' happened)" compiling code using arrows and elimReader (test case included)

[GHC]

#5045: "panic! (the 'impossible' happened)" compiling code using arrows and
elimReader (test case included)
-------------------------------+--------------------------------------------
    Reporter:  josh            |        Owner:              
        Type:  bug             |       Status:  new         
    Priority:  normal          |    Milestone:              
   Component:  Compiler        |      Version:  7.0.2       
    Keywords:                  |     Testcase:              
   Blockedby:                  |   Difficulty:              
          Os:  Linux           |     Blocking:              
Architecture:  x86_64 (amd64)  |      Failure:  None/Unknown
-------------------------------+--------------------------------------------

Comment(by daniel.is.fischer):

 Just to make sure: the patch is not yet in, so today's HEAD panicking on
 those is still to be expected?

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5045#comment:4>
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