[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 Ben Gamari <ben@…>):

 In [changeset:"f90e61ad6e5fa0655185f14ca128d507e489c4b7/ghc" f90e61a/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="f90e61ad6e5fa0655185f14ca128d507e489c4b7"
 Make deSugarExpr use runTcInteractive

 Preparation for #13102, which needs to add more logic to
 runTcInteractive, which would need to be duplicated in deSugarExpr.

 In order to break an import cycle, I had to move
 "Dependency/fingerprinting code" to a new module
 DsUsage; which seems sensible anyways.

 Test Plan: validate

 Reviewers: simonpj, austin, bgamari

 Reviewed By: bgamari

 Subscribers: thomie, snowleopard

 Differential Revision: https://phabricator.haskell.org/D3125
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13102#comment:20>
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