[GHC] #13487: GHC panic with deferred custom type errors

[GHC]

#13487: GHC panic with deferred custom type errors
-------------------------------------+-------------------------------------
        Reporter:  DimaSamoz         |                Owner:  (none)
            Type:  bug               |               Status:  merge
        Priority:  normal            |            Milestone:  8.2.1
       Component:  GHCi              |              Version:  8.0.2
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Compile-time      |            Test Case:
  crash or panic                     |  typecheck/should_fail/T13487
      Blocked By:                    |             Blocking:
 Related Tickets:  #12104            |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------
Changes (by RyanGlScott):

 * related:   => #12104
 * milestone:  8.4.1 => 8.2.1


Comment:

 This was marked as merge, but the milestone was 8.4.1. I've opted to mark
 it for the 8.2.1 milestone, especially since it fixes #12104 (see
 https://ghc.haskell.org/trac/ghc/ticket/12104#comment:8).

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13487#comment:7>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler