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

[GHC]

#11822: Pattern match checker exceeded (2000000) iterations
-------------------------------------+-------------------------------------
        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:                    |
-------------------------------------+-------------------------------------

Comment (by gkaracha):

 But if we do this silently, we may get no warning at all for non-
 exhaustive matches, even with `-Wall` on. Don't you think that this is
 much worse in terms of safety?

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11822#comment:9>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler