[GHC] #11822: Pattern match checker exceeded (2000000) iterations

[GHC]

#11822: Pattern match checker exceeded (2000000) iterations
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        Reporter:  j.waldmann        |                Owner:  gkaracha
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1-rc3
      Resolution:                    |             Keywords:
                                     |  PatternMatchWarnings
Operating System:  Unknown/Multiple  |         Architecture:  x86_64
 Type of failure:  Compile-time      |  (amd64)
  performance bug                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by carter):

 I guess one question I have here is whether we can improve the
 approximation here to have better bounds in the non gadt case?
 I do like having informative coverage warnings rather than silent anything
 or resource blowups on my lap top (though 8.0 does claim 1tb of virtual
 memory either way :))

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11822#comment:11>
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