[GHC] #10650: Can't define GHCi :def macro with NoImplicitPrelude on

[GHC]

#10650: Can't define GHCi :def macro with NoImplicitPrelude on
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        Reporter:  RyanGlScott       |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:
       Component:  GHCi              |                 Version:  7.10.1
      Resolution:                    |                Keywords:  newcomer
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  GHC rejects       |  Unknown/Multiple
  valid program                      |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:  #8640             |  Differential Revisions:
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Changes (by rwbarton):

 * keywords:   => newcomer


Comment:

 These references to `String` and `IO` are from the expression that is
 built in `InteractiveUI.defineMacro`, see the comment:

 {{{
     -- > ghciStepIO . definition :: String -> IO String
 }}}

 `RdrName` is a name that is not necessarily bound to a particular module.
 In this setting in ghci it only makes sense to use the `String` from the
 real `Prelude`. I'm not terribly familiar with this part of the compiler,
 but I imagine it is an easy local fix in `defineMacro`.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10650#comment:1>
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