[GHC] #10786: ghci panic if {-# OPTIONS_GHC -O2 #-}

[GHC]

#10786: ghci panic if {-# OPTIONS_GHC -O2 #-}
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              Reporter:  rhovland        |             Owner:
                  Type:  bug             |            Status:  new
              Priority:  normal          |         Milestone:
             Component:  GHCi            |           Version:  7.10.2
              Keywords:                  |  Operating System:  Linux
          Architecture:  x86_64 (amd64)  |   Type of failure:  GHCi crash
             Test Case:                  |        Blocked By:
              Blocking:                  |   Related Tickets:
Differential Revisions:                  |
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 any file with the pragma OPTIONS_GHC -O2 causes ghci to panic, say
 something 'impossible' happened, and says to file a bug report.

 previous ghci ignored this pragma (I think). at any rate, it didn't panic.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10786>
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