[GHC] #13446: Deferred type error sneaks in with -fno-defer-type-errors enabled

[GHC]

#13446: Deferred type error sneaks in with -fno-defer-type-errors enabled
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        Reporter:  RyanGlScott       |                Owner:  (none)
            Type:  bug               |               Status:  merge
        Priority:  normal            |            Milestone:  8.2.1
       Component:  Compiler (Type    |              Version:  8.0.2
  checker)                           |
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  GHC accepts       |            Test Case:
  invalid program                    |  typecheck/should_fail/T13446
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by Simon Peyton Jones <simonpj@…>):

 In [changeset:"f88ac374c5cb150d4f172fb40be338d2112a0600/ghc"
 f88ac374/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="f88ac374c5cb150d4f172fb40be338d2112a0600"
 Fix ASSERT failure in TcErrors

 This fixes Trac #13494, by improving

    commit e0ad55f894a8d85dcc099c33c63cfe3d4515d464
    Author: Simon Peyton Jones <simonpj at microsoft.com>
    Date:   Mon Mar 27 10:32:08 2017 +0100

    Fix error-message suppress on given equalities

 which in turn was a fix to #13446
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13446#comment:6>
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