[GHC] #8429: GHC.Base.{breakpoint, breakpointCond} do nothing

[GHC]

#8429: GHC.Base.{breakpoint, breakpointCond} do nothing
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        Reporter:  refold            |            Owner:
            Type:  feature request   |           Status:  new
        Priority:  normal            |        Milestone:  7.10.1
       Component:  Compiler          |          Version:  7.6.3
      Resolution:                    |         Keywords:
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown      |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:  1377
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Changes (by simonmar):

 * type:  bug => feature request
 * milestone:   => 7.10.1


Comment:

 To make them work, you would need to treat them as magic identifiers that
 get recognised by the desugarer and replaced with actual breakpoints.
 This probably wouldn't be too hard.  The module that inserts breakpoints
 is `compiler/deSugar/Coverage.hs`, and what we want to do is something
 similar to the way that `{-# SCC #-}` is handled, in
 `compiler/deSugar/DsExpr.lhs`.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8429#comment:6>
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