[GHC] #11276: GHC hangs/takes an exponential amount of time with simple program

[GHC]

#11276: GHC hangs/takes an exponential amount of time with simple program
-------------------------------------+-------------------------------------
        Reporter:  mpickering        |                Owner:  gkaracha
            Type:  bug               |               Status:  new
        Priority:  highest           |            Milestone:  8.0.1
       Component:  Compiler          |              Version:  7.10.3
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by simonpj):

 George: short term, can we just degrade gracefully for now, and do
 something that doesn't blow up, at the expense of maybe reporting fewer
 warnings?

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11276#comment:12>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler