[GHC] #11071: The "Not in scope" error is misleading

8 Nov 2015

      #11071: The "Not in scope" error is misleading
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           Reporter:  mojojojo       |             Owner:
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:
          Component:  Compiler       |           Version:  7.10.2
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  None/Unknown
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
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 E.g., if I have something like `Maybe.maybeToList` in a module, which does
 not have such an import, I get the following error:

     Not in scope: ‘Maybe.maybeToList’

 Which leads the user to conclude that the `Maybe` namespace does not
 contain the `maybeToList` element, instead of informing that the `Maybe`
 namespace is not imported altogether instead.

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Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11071
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