[GHC] #13908: sameMutableArray equivalent for Array

[GHC]

#13908: sameMutableArray equivalent for Array
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        Reporter:  winter            |                Owner:  (none)
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:  8.4.1
       Component:  Compiler          |              Version:  8.0.1
      Resolution:  wontfix           |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D3697
       Wiki Page:                    |
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Comment (by winter):

 Sounds reasonable. I will go with unsafeCoerce#.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13908#comment:8>
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