[GHC] #16302: A non-function coerced to a function can cause a stg_ap_pp_ret

[GHC]

#16302: A non-function coerced to a function can cause a stg_ap_pp_ret
-------------------------------------+-------------------------------------
        Reporter:  WheatWizard       |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.4.3
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:  x86_64
                                     |  (amd64)
 Type of failure:  Runtime crash     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by potato44):

 I don't think this counts as a bug because we don't have many guarantees
 about `unsafeCoerce` besides for newtypes.

 I think it might be easier for others to read the bug report if you were
 to ungolf the code.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/16302#comment:1>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler