[GHC] #15128: emitPrimOp: can't translate PrimOp

[GHC]

#15128: emitPrimOp: can't translate PrimOp
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        Reporter:  tianxiaogu        |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.6.1
       Component:  Compiler          |              Version:  8.5
      Resolution:                    |             Keywords:
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 simonpj):

 >  You're trying to coerce a state token to ByteArray#.

 Which is certainly a bad thing to do.  I wonder if we can produce a more
 civilised error, from Core Lint, perhaps?  We should not unsafely coerce
 between types with different representations, and that might not be too
 hard to spot.  Just by looking at the kind of the two types.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15128#comment:2>
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