[GHC] #10218: GHC creates incorrect code which throws <<loop>>

[GHC]

#10218: GHC creates incorrect code which throws <<loop>>
-------------------------------------+-------------------------------------
        Reporter:  yongqli           |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:
       Component:  Compiler          |                 Version:  7.10.1
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  None/Unknown      |  Unknown/Multiple
      Blocked By:                    |               Test Case:  yes
 Related Tickets:                    |                Blocking:
                                     |  Differential Revisions:
-------------------------------------+-------------------------------------

Comment (by shachaf):

 I simplified AlexET's example some more. This bug is very touchy.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10218#comment:3>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler