Re: [GHC] #9583: Simplifier ticks exhausted while compiling Cabal HEAD

16 Sep 2014

      #9583: Simplifier ticks exhausted while compiling Cabal HEAD
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              Reporter:  ezyang      |            Owner:
                  Type:  bug         |           Status:  new
              Priority:  highest     |        Milestone:
             Component:  Compiler    |          Version:  7.9
            Resolution:              |         Keywords:
      Operating System:              |     Architecture:  Unknown/Multiple
  Unknown/Multiple                   |       Difficulty:  Unknown
       Type of failure:  Compile-    |       Blocked By:
  time crash                         |  Related Tickets:
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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Comment (by ezyang):

 I've reduced the test case example. It appears to be related to the
 Generic binary implementation:

 {{{
 {-# LANGUAGE DeriveDataTypeable #-}
 {-# LANGUAGE DeriveGeneric #-}

 module Distribution.Version  where

 import Data.Binary      ( Binary(..) )
 import Data.Data        ( Data )
 import Data.Typeable    ( Typeable )
 import GHC.Generics     ( Generic )

 data T = A
        | B
        | C T
        | D T T
        | E T T
   deriving (Data, Generic, Typeable)

 instance Binary T
 }}}

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Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9583#comment:5
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