patch applied (ghc-6.8/ghc): Fix #1709: do not expose the worker for a loop-breaker

[Simon Peyton Jones]

Tue Oct 16 06:18:40 PDT 2007  simonpj at microsoft.com
  * Fix #1709: do not expose the worker for a loop-breaker
  
  The massive 'Uni' program produced a situation in which a function that
  had a worker/wrapper split was chosen as a loop breaker.  If the worker
  is exposed in the interface file, then an importing module may go into
  an inlining loop: see comments on TidyPgm.tidyWorker.
  
  This patch fixes the inlining bug.  The code that gives rise to this
  bizarre case is still not good (it's a bunch of implication constraints
  and we are choosing a bad loop breaker) but the first thing is to fix the
  bug.
  
  It's rather hard to produce a test case!
  
  Please merge to the 6.8 branch.
  
  
  

    M ./compiler/main/TidyPgm.lhs -7 +19