[GHC] #11298: Implicit call stack empty in instance declarations

[GHC]

#11298: Implicit call stack empty in instance declarations
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        Reporter:  pikajude          |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.0.1
       Component:  Compiler          |              Version:  7.11
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         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 simonpj):

 Is the user manual section about implicit call-stacks up to date?  Does it
 mention that a bare `?loc::CallStack` makes an empty stack?  Does it give
 the functions that work on call-stacks?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11298#comment:6>
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