[GHC] #4431: SpecConstr doesn't specialise

[GHC]

#4431: SpecConstr doesn't specialise
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    Reporter:  rl                |        Owner:                         
        Type:  bug               |       Status:  merge                  
    Priority:  normal            |    Milestone:                         
   Component:  Compiler          |      Version:  7.1                    
    Keywords:                    |     Testcase:                         
   Blockedby:                    |   Difficulty:                         
          Os:  Unknown/Multiple  |     Blocking:                         
Architecture:  Unknown/Multiple  |      Failure:  Runtime performance bug
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Changes (by simonpj):

  * status:  new => merge


Comment:

 Good point! Fixed by
 {{{
 Mon Oct 25 07:31:08 PDT 2010  simonpj at microsoft.com
   * For a non-recursive let, make sure we extend the value environment

   This has been wrong for a long time.  Fixes Trac #4431.

     M ./compiler/specialise/SpecConstr.lhs -4 +8
 }}}
 Please merge.

 Simon

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4431#comment:1>
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