[GHC] #13102: orphan family instances can leak through the EPS in --make mode

[GHC]

#13102: orphan family instances can leak through the EPS in --make mode
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        Reporter:  rwbarton          |                Owner:  rwbarton
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by ezyang):

 Just popping in: rwbarton, in the overloaded lists case, why don't we just
 consider `GHC.Exts` as visible always? In fact, we already do something
 like this for wired in things: see `Note [Loading instances for wired-in
 things]`. There should only be a fixed number of these...

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13102#comment:11>
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