[GHC] #16246: GHC HEAD-only Core Lint error with unboxed equality (Non-CoVar has coercion type)

[GHC]

#16246: GHC HEAD-only Core Lint error with unboxed equality (Non-CoVar has coercion
type)
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        Reporter:  RyanGlScott       |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.10.1
       Component:  Compiler          |              Version:  8.6.3
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  crash or panic                     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #15648            |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by simonpj):

 OK, to be clear then, your proposal is that:

 * `CoVars ` must have `(~#)` types
 * But non `CoVars` can have `(~#)` types too

 Is that what you are saying?

 That's ok with me. But `core-spec/` would need updating to reflect this.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/16246#comment:5>
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