[GHC] #13981: Family instance consistency checks happens too early when hs-boot defined type occurs on LHS

[GHC]

#13981: Family instance consistency checks happens too early when hs-boot defined
type occurs on LHS
-------------------------------------+-------------------------------------
        Reporter:  ezyang            |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler (Type    |              Version:  8.2.1-rc2
  checker)                           |
      Resolution:                    |             Keywords:  hs-boot
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by Ben Gamari <ben@…>):

 In [changeset:"fdb6a5bfd545094782fb539951b561ac2467443d/ghc" fdb6a5b/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="fdb6a5bfd545094782fb539951b561ac2467443d"
 Make IfaceAxiom typechecking lazier.

 Fixes #13803, but adds a note about a yet to be fixed #13981.

 Signed-off-by: Edward Z. Yang <ezyang at cs.stanford.edu>

 Test Plan: validate

 Reviewers: bgamari, austin

 Reviewed By: bgamari

 Subscribers: simonpj, rwbarton, thomie

 GHC Trac Issues: #13803

 Differential Revision: https://phabricator.haskell.org/D3742
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13981#comment:4>
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