[GHC] #8579: Loading a module in GHCi affects shadowing

[GHC]

#8579: Loading a module in GHCi affects shadowing
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       Reporter:  monoidal          |             Owner:
           Type:  bug               |            Status:  new
       Priority:  normal            |         Milestone:
      Component:  Compiler          |           Version:  7.6.3
       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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 In GHCi we can redefine a data declaration; last definition counts. But
 loading a module has a side effect of bringing the first declaration to
 front:

 {{{
 λ> data A = X
 λ> data A = Y
 λ> :i A
 data A = Y      -- Defined at <interactive>:3:6
 λ> :m Data.List
 λ> :i A
 data A = X      -- Defined at <interactive>:2:6
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8579>
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