[GHC] #13833: Instances with GHC.TypeLits.Nat/Symbol should be possible without FlexibleInstances.

[GHC]

#13833: Instances with GHC.TypeLits.Nat/Symbol should be possible without
FlexibleInstances.
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        Reporter:  Hjulle            |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  low               |            Milestone:
       Component:  Compiler          |              Version:  8.0.2
      Resolution:                    |             Keywords:  newcomer
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by AntC):

 Um, is there anybody using fancy type stuff like `TypeLits`, but not
 needing `FlexibleInstances`? I know
 [https://downloads.haskell.org/~ghc/8.4.2/docs/html/users_guide/glasgow_exts.html
 `-fglasgow-exts`] is deprecated these days, but I always switch on those
 extensions anyway.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13833#comment:2>
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