#10852: ghc 7.8.4 on arm - panic: Simplifier ticks exhausted -------------------------------------+------------------------------------- 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: | -------------------------------------+------------------------------------- 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. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10852 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler