[GHC] #8278: Improve error message when the same type is imported from two different library versions

[GHC]

#8278: Improve error message when the same type is imported from two different
library versions
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        Reporter:  Yuras             |            Owner:
            Type:  feature request   |           Status:  new
        Priority:  normal            |        Milestone:
       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:
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Comment (by Simon Peyton Jones <simonpj@…>):

 In [changeset:"9ca32193a82218c18a633d1ae505248d65ef17a4/testsuite"]:
 {{{
 #!CommitTicketReference repository="testsuite"
 revision="9ca32193a82218c18a633d1ae505248d65ef17a4"
 Wibbles following fix to Trac #8278

 The error message for ghci052 and ghci053 are (still)
 terrible, because there is shadowing going on in the
 interactive context.  But that's a separate matter.
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8278#comment:4>
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