[GHC] #12177: Relevant bindings includes shadowed bindings

[GHC]

#12177: Relevant bindings includes shadowed bindings
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        Reporter:  ezyang            |                Owner:
            Type:  bug               |               Status:  patch
        Priority:  normal            |            Milestone:
       Component:  Compiler (Type    |              Version:  8.0.1
  checker)                           |
      Resolution:                    |             Keywords:  newcomer
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D2434
       Wiki Page:                    |
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Comment (by Edward Z. Yang <ezyang@…>):

 In [changeset:"89ae1e858f6eed42cebd9af01b30e239d4543faf/ghc" 89ae1e8/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="89ae1e858f6eed42cebd9af01b30e239d4543faf"
 Relevant Bindings no longer reports shadowed bindings (fixes #12176)

 Summary: Modified the RelevantBindings method in TcErrors.hs to only
 search over
 non-shadowed bindings.

 Test Plan: Wrote 2 simple test cases, verified that it worked with
 multiple
 shadowed bindings, and also non-shadowed bindings.

 Reviewers: austin, bgamari, ezyang

 Reviewed By: ezyang

 Subscribers: ezyang, thomie

 Differential Revision: https://phabricator.haskell.org/D2434

 GHC Trac Issues: #12177
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12177#comment:7>
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