[GHC] #13350: COMPLETE sets aren't read from external packages

[GHC]

#13350: COMPLETE sets aren't read from external packages
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        Reporter:  RyanGlScott       |                Owner:  RyanGlScott
            Type:  bug               |               Status:  patch
        Priority:  highest           |            Milestone:  8.2.1
       Component:  Compiler          |              Version:  8.1
      Resolution:                    |             Keywords:
                                     |  PatternSynonyms
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Incorrect         |  Unknown/Multiple
  error/warning at compile-time      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D3257
       Wiki Page:                    |
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Comment (by Ben Gamari <ben@…>):

 In [changeset:"0d2f733050ff656b827351108d988e09abc363fc/ghc"
 0d2f7330/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="0d2f733050ff656b827351108d988e09abc363fc"
 Read COMPLETE sets from external packages

 Currently, `COMPLETE` pragmas are not read from external packages at
 all, which quite limits their usefulness. This extends
 `ExternalPackageState` to include `COMPLETE` sets from other packages,
 and plumbs around the appropriate values to make it work the way you'd
 expect it to.

 Fixes #13350.

 Test Plan: make test TEST=T13350

 Reviewers: rwbarton, mpickering, austin, simonpj, bgamari

 Reviewed By: simonpj

 Subscribers: simonpj, thomie

 Differential Revision: https://phabricator.haskell.org/D3257
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13350#comment:5>
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