[GHC] #13800: ghc panic: No skolem info: s_a7aK[sk]

[GHC]

#13800: ghc panic: No skolem info: s_a7aK[sk]
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        Reporter:  hexo              |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.2
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:  x86_64
 Type of failure:  Compile-time      |  (amd64)
  crash or panic                     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by RyanGlScott):

 I tried to build the library with GHC 8.2, but unfortunately, I was unable
 to compile a dependency (`ivory-bsp-stm32`) due to a GHC 8.2 regression.
 See #13804.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13800#comment:3>
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