[GHC] #11158: Combine exprIsTrivial and cpe_ExprIsTrivial

[GHC]

#11158: Combine exprIsTrivial and cpe_ExprIsTrivial
-------------------------------------+-------------------------------------
        Reporter:  simonpj           |                Owner:  bgamari
            Type:  task              |               Status:  patch
        Priority:  highest           |            Milestone:  8.2.1
       Component:  Compiler          |              Version:  7.10.2
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D1656
       Wiki Page:                    |
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Changes (by simonpj):

 * priority:  normal => highest
 * milestone:  8.0.1 => 8.2.1


Comment:

 I suppose is isn't urgent for 8.0, but I really would like to get to the
 bottom of these seg-faults.  So I'll make it "highest" for 8.2.

 Ben may find time to investigate, but perhaps someone else could?  It's a
 very specific change so it should not be hard.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11158#comment:8>
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