[GHC] #7453: unsafe coerce without extensions

[GHC]

#7453: unsafe coerce without extensions
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Reporter:  guest                        |          Owner:                         
    Type:  bug                          |         Status:  new                    
Priority:  normal                       |      Component:  Compiler (Type checker)
 Version:  7.6.1                        |       Keywords:                         
      Os:  Unknown/Multiple             |   Architecture:  Unknown/Multiple       
 Failure:  GHC accepts invalid program  |      Blockedby:                         
Blocking:                               |        Related:                         
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Comment(by guest):

 Reported by Eric Mertens <emertens at gmail.com> with help from Edward A.
 Kmett <ekmett at gmail.com> after I encountering this bug in the course of
 using one of his libraries.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7453#comment:1>
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