[GHC] #9422: EPT caching on --make can make spurious instances visible

[GHC]

#9422: EPT caching on --make can make spurious instances visible
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              Reporter:  ezyang      |            Owner:
                  Type:  bug         |           Status:  closed
              Priority:  normal      |        Milestone:
             Component:  Compiler    |          Version:  7.9
  (Type checker)                     |         Keywords:
            Resolution:  duplicate   |     Architecture:  Unknown/Multiple
      Operating System:              |       Difficulty:  Unknown
  Unknown/Multiple                   |       Blocked By:
       Type of failure:  GHC         |  Related Tickets:  8427
  accepts invalid program            |
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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Changes (by ezyang):

 * status:  new => closed
 * resolution:   => duplicate
 * related:   => 8427


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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9422#comment:2>
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