[GHC] #13195: Ticks panic

[GHC]

#13195: Ticks panic
-------------------------------------+-------------------------------------
           Reporter:  mojojojo       |             Owner:
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:
          Component:  Compiler       |           Version:  8.0.1
           Keywords:                 |  Operating System:  MacOS X
       Architecture:                 |   Type of failure:  Compile-time
  Unknown/Multiple                   |  crash or panic
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
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 {{{
 Preprocessing test suite 'tests' for url-decoders-1...
 [1 of 1] Compiling Main             ( tests/Main.hs, dist/build/tests
 /tests-tmp/Main.o )

 <no location info>: error:
     ghc: panic! (the 'impossible' happened)
   (GHC version 8.0.1 for x86_64-apple-darwin):
         Simplifier ticks exhausted
   When trying UnfoldingDone withForeignPtr1
   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: 144969
 }}}

 To reproduce the but, clone a repo under the specified commit from the
 following URL: https://github.com/nikita-volkov/url-
 decoders/tree/22410402a41b7524a1af03d78e381e9ea6354944

 Then run the following command on the project:

 {{{
 cabal configure --enable-tests && cabal build --ghc-options=-O2
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13195>
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