[GHC] #11550: ghc-HEAD -DDEBUG is broken (possiby by D1880)

[GHC]

#11550: ghc-HEAD -DDEBUG is broken (possiby by D1880)
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        Reporter:  slyfox            |                Owner:
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.1
      Resolution:  fixed             |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  crash                              |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D1889
       Wiki Page:                    |
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Comment (by simonpj):

 I responded to the Phab: There's an easier way. Use the old code for
 `stgArgHasCafRefs` use
 {{{
 stgIdHasCafRefs :: Id -> Bool
 stgIdHasCafRefs id =  isGlobalId id && mayHaveCafRefs (idCafInfo id)
 }}}
 After `TidyPgm`, all top-level and imported Ids are `GlobalIds`. Needs a
 comment of course!

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11550#comment:6>
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