[GHC] #11444: 8.0 rc1 panics in applyTypeToArgs

[GHC]

#11444: 8.0 rc1 panics in applyTypeToArgs
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        Reporter:  osa1              |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.2.1
       Component:  Compiler          |              Version:  8.0.1-rc1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #13027            |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by dfeuer):

 The substitution of `x` for `y` in the note you mention above sounds
 rather wrong for pointer equality. In particular, we probably never want a
 pointer equality test to float out of a case on one of its arguments.
 Floating one *in* should be fine.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11444#comment:13>
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