[GHC] #14626: No need to enter a scrutinised value

[GHC]

#14626: No need to enter a scrutinised value
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        Reporter:  heisenbug         |                Owner:  heisenbug
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.2.2
      Resolution:                    |             Keywords:  performance
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #13861            |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by heisenbug):

 Replying to [comment:36 simonpj]:
 > >  (That would explain why I often get crashes when mixing -O0 and -O1)
 >
 > The strict-field unboxing choice should be made once and for all at the
 module declaring the data constructor. If client modules made a different
 choice there'd be chaos.  If you think that is happening can you
 demonstrate?

 I'll watch out for it. I've crashed my GHC in many very different ways in
 the last weeks, so it is impossible to remember. My taggedness-check on
 strict constructor fields will need to deal with this anyway, so we'll
 possibly get hard data soon.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14626#comment:41>
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