[GHC] #15599: typeclass inference depends on whether a module is exposed.

[GHC]

#15599: typeclass inference depends on whether a module is exposed.
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        Reporter:  gleachkr          |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.2.3
       Component:  Compiler          |              Version:  8.2.2
      Resolution:                    |             Keywords:
Operating System:  Linux             |         Architecture:
 Type of failure:  Incorrect result  |  Unknown/Multiple
  at runtime                         |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by gleachkr):

 Thanks for the quick reply. I've updated the repro repo with test-ghci.sh,
 which uses only ghci, but which demonstrates similar behavior. I did need
 to load the pkgdbs that stack generated. I've included those in the repo,
 in case they might help.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15599#comment:2>
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