[GHC] #10565: GHC 7.10.2 RC: the impossible happened on hPDB-examples-1.2.0.2

[GHC]

#10565: GHC 7.10.2 RC: the impossible happened on hPDB-examples-1.2.0.2
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              Reporter:  snoyberg        |             Owner:
                  Type:  bug             |            Status:  new
              Priority:  normal          |         Milestone:  7.10.2
             Component:  Compiler        |           Version:  7.10.2-rc1
              Keywords:                  |  Operating System:  Linux
          Architecture:  x86_64 (amd64)  |   Type of failure:  None/Unknown
             Test Case:                  |        Blocked By:
              Blocking:                  |   Related Tickets:
Differential Revisions:                  |
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 When compiling with the RC for Stackage, I get:

 {{{
 [1 of 1] Compiling Main             ( examples/Rg.hs, dist/build/Rg/Rg-
 tmp/Main.o )

 <no location info>:
     ghc: panic! (the 'impossible' happened)
   (GHC version 7.10.1.20150619 for x86_64-unknown-linux):
         Simplifier ticks exhausted
   When trying UnfoldingDone bindIO
   To increase the limit, use -fsimpl-tick-factor=N (default 100)
   If you need to do this, let GHC HQ know, and what factor you needed
   To see detailed counts use -ddump-simpl-stats
   Total ticks: 19573
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10565>
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