[GHC] #10852: ghc 7.8.4 on arm - panic: Simplifier ticks exhausted

[GHC]

#10852: ghc 7.8.4 on arm - panic: Simplifier ticks exhausted
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              Reporter:              |             Owner:
  andrewufrank                       |
                  Type:  bug         |            Status:  new
              Priority:  normal      |         Milestone:
             Component:  Compiler    |           Version:  7.10.2
              Keywords:              |  Operating System:  Linux
          Architecture:              |   Type of failure:  Compile-time
  Unknown/Multiple                   |  crash
             Test Case:              |        Blocked By:
              Blocking:              |   Related Tickets:
Differential Revisions:              |
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 i tried to compile (cabal install) chatter-0.5.2.0 on a armbian (debian
 jessie, with ghc 7.10.2-1 from testing, running on a cubietruck ARMHF
 Cortex A20) and get in file NLP.Corpora.Conll a panic:

 [ 9 of 23] Compiling NLP.Corpora.Conll ( src/NLP/Corpora/Conll.hs,
 dist/build/NLP/Corpora/Conll.o )
 ghc: panic! (the 'impossible' happened)
   (GHC version 7.10.2 for arm-unknown-linux):
         Simplifier ticks exhausted
   When trying UnfoldingDone $fGSerialize:*:_$s<$>
   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: 2748218

 i do not notice anything particular in the code, except a very long data
 type with enumerated values. I tried with a higher value for tick-factor
 (1000) with no improvement.

 i will now try to run 7.10.2-2 from experimental.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10852>
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