[GHC] #15073: Unable to newtype derive `Prim` via DerivingStrategies

[GHC]

#15073: Unable to newtype derive `Prim` via DerivingStrategies
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        Reporter:  fosskers          |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.6.1
       Component:  Compiler          |              Version:  8.2.2
      Resolution:                    |             Keywords:  deriving
Operating System:  Unknown/Multiple  |         Architecture:  x86_64
                                     |  (amd64)
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by RyanGlScott):

 Ah, now I see why you were confused—the `Illegal unboxed tuple type as
 function argument` error message doesn't recommend enabling
 `UnboxedTuples`. Would you consider this issue resolved if the error
 message were revised to do so?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15073#comment:3>
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