[GHC] #11518: Test TcCoercibleFail hangs with substitution sanity checks enabled

[GHC]

#11518: Test TcCoercibleFail hangs with substitution sanity checks enabled
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        Reporter:  niteria           |                Owner:  niteria
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler (Type    |              Version:  8.1
  checker)                           |
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  performance bug                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by Simon Peyton Jones <simonpj@…>):

 In [changeset:"a96c4e7ca391ff3003d5debf187e7d177131f2fe/ghc" a96c4e7/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="a96c4e7ca391ff3003d5debf187e7d177131f2fe"
 Add comments to TcCoercibleFail

 Flag up the problem highlighted in Trac #11518 comment:15
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11518#comment:18>
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