#5539: GHC panic - Simplifier ticks exhausted
---------------------------------+------------------------------------------
Reporter: hvr | Owner:
Type: bug | Status: new
Priority: normal | Milestone:
Component: Compiler | Version: 7.3
Resolution: | Keywords:
Testcase: | Blockedby:
Difficulty: | Os: Linux
Blocking: | Architecture: x86_64 (amd64)
Failure: Compile-time crash |
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Changes (by bgamari):
* cc: bgamari@… (added)
Comment:
I also see this with vector-algorithms on today's master,
{{{
[8 of 9] Compiling Data.Vector.Algorithms.Intro (
Data/Vector/Algorithms/Intro.hs, dist/build/Data/Vector/Algorithms/Intro.o
)
ghc: panic! (the 'impossible' happened)
(GHC version 7.3.20111107 for x86_64-unknown-linux):
Simplifier ticks exhausted
When trying UnfoldingDone ghc-prim:GHC.Classes.||{v r1c} [gid]
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: 46921
}}}
Things work with -fsimpl-tick-factor=168, however.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5539#comment:14>
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