[GHC] #3059: 3 different behaviours depending on profiling settings and on a used-only-once form being top-level

[GHC]

#3059: 3 different behaviours depending on profiling settings and on a used-only-
once form being top-level
----------------------+-----------------------------------------------------
 Reporter:  jkff      |          Owner:        
     Type:  bug       |         Status:  new   
 Priority:  normal    |      Milestone:        
Component:  Compiler  |        Version:  6.10.1
 Severity:  normal    |     Resolution:        
 Keywords:            |       Testcase:        
       Os:  Windows   |   Architecture:  x86   
----------------------+-----------------------------------------------------
Comment (by ChrisKuklewicz):

 {{{
 module Text.Regex.TDFA.Wrap...

 (=~) :: (RegexMaker Regex CompOption ExecOption source,RegexContext Regex
 source1 target)
      => source1 -> source -> target
 (=~) x r = let make :: RegexMaker Regex CompOption ExecOption a => a ->
 Regex
                make = makeRegex
            in match (make r) x
 }}}

 The =~ API is very high level — if you need to cache the compiled regular
 expression then you should not depend on the compiler, but rather use
 "makeRegex" explicitly.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3059#comment:1>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler