[GHC] #11383: CAFs lose sharing due to implicit call stacks

[GHC]

#11383: CAFs lose sharing due to implicit call stacks
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        Reporter:  simonmar          |                Owner:  gridaphobe
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.0.1
       Component:  Compiler          |              Version:  8.0.1-rc1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by simonmar):

 We may or may not consider this a bug, so I'm reporting it for discussion.
 Arguably it's the same as using any overloaded function in a CAF together
 with `NoMonomorphismRestriction`, the surprising bit is that `error` is
 now "overloaded".

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11383#comment:1>
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