[GHC] #11371: Bogus in-scope set in substitutions

[GHC]

#11371: Bogus in-scope set in substitutions
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        Reporter:  simonpj           |                Owner:  niteria
            Type:  bug               |               Status:  new
        Priority:  high              |            Milestone:  8.4.1
       Component:  Compiler          |              Version:  7.10.3
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #11360            |  Differential Rev(s):  phab:D1792,
       Wiki Page:                    |  phab:D1801, phab:D1802
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Comment (by Bartosz Nitka <niteria@…>):

 In [changeset:"e19b6464cc8ea498775074a680f91d3e5b5636d3/ghc"
 e19b6464/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="e19b6464cc8ea498775074a680f91d3e5b5636d3"
 Compute InScopeSet in substInteractiveContext

 It doesn't look like we keep any sets of free variables
 of the types of Ids handy, so we just have to build them
 when doing a substitution.

 Test Plan: buildbot + run testsuite with debug

 Reviewers: simonmar, simonpj, austin, bgamari

 Reviewed By: simonpj

 Subscribers: carter, rwbarton, thomie

 GHC Trac Issues: #11371

 Differential Revision: https://phabricator.haskell.org/D3431
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11371#comment:63>
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