[GHC] #15428: Oversaturated type family application panicks GHC (piResultTys2) (was: GHC 8.6+ panics (piResultTys2), older GHCs don't)

[GHC]

#15428: Oversaturated type family application panicks GHC (piResultTys2)
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        Reporter:  RyanGlScott       |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  high              |            Milestone:  8.6.1
       Component:  Compiler          |              Version:  8.5
      Resolution:                    |             Keywords:  TypeInType,
                                     |  TypeFamilies
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  crash or panic                     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by RyanGlScott):

 Nice find. I've changed the title accordingly, since this affects all GHCs
 back to 8.0.1.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15428#comment:2>
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