[GHC] #15695: Core Lint error, from -fobject-code + defer type errors + pattern synonyms + other stuff

[GHC]

#15695: Core Lint error, from -fobject-code + defer type errors + pattern synonyms
+ other stuff
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        Reporter:  Iceland_jack      |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.6.1
       Component:  Compiler          |              Version:  8.6.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  crash or panic                     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by RyanGlScott):

 I'm failing to see where the Core Lint error is in this program. There's
 some `WARNING`s, but those aren't the same as Core Lint errors (and
 indeed, it's not terribly uncommon to see `WARNING`s).

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15695#comment:2>
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