[GHC] #14970: GHC.Err.errorWithoutStackTrace produces stack trace when profiling enabled

[GHC]

#14970: GHC.Err.errorWithoutStackTrace produces stack trace when profiling enabled
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        Reporter:  rotaerk           |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  libraries/base    |              Version:  8.2.2
      Resolution:                    |             Keywords:
Operating System:  Linux             |         Architecture:
 Type of failure:  Incorrect result  |  Unknown/Multiple
  at runtime                         |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by bgamari):

 Indeed I think this is expected. The point (as I understand it) of
 `errorWithoutStackTrace` is to avoid the (potential) runtime cost of
 `HasCallStack`. In the case of the CCS stack there is no additional cost
 to providing the stack-trace.

 We probably ought to document this, however.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14970#comment:3>
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