[GHC] #3731: SYB gone wild - mysterious <<loop>> in code derived from an syb-with-class example

[GHC]

#3731: SYB gone wild - mysterious <<loop>> in code derived from an syb-with-class
example
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    Reporter:  dsf               |        Owner:                             
        Type:  bug               |       Status:  new                        
    Priority:  normal            |    Milestone:  7.0.1                      
   Component:  Compiler          |      Version:  6.13                       
    Keywords:                    |     Testcase:                             
   Blockedby:                    |   Difficulty:                             
          Os:  Unknown/Multiple  |     Blocking:                             
Architecture:  Unknown/Multiple  |      Failure:  Incorrect result at runtime
---------------------------------+------------------------------------------

Comment(by Saizan):

 with ghc HEAD from a few days ago none of the two test cases hangs
 anymore.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3731#comment:11>
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