[GHC] #15648: Core Lint error with source-level unboxed equality

[GHC]

#15648: Core Lint error with source-level unboxed equality
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        Reporter:  RyanGlScott       |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.8.1
       Component:  Compiler          |              Version:  8.4.3
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  crash or panic                     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #15209            |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by RyanGlScott):

 Replying to [comment:3 goldfire]:
 > Did you have `-dcore-lint` on in comment:2?

 I didn't (it'll give the same Core Lint error as before if you do). I just
 wanted to give an example which shows that the problem is more severe than
 just an ordinary Core Lint warning (i.e., you can make GHC crash without
 needing to resort to debugging flags like `-dcore-lint`).

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15648#comment:4>
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