[GHC] #12589: GHC panic with defer-typed-holes

[GHC]

#12589: GHC panic with defer-typed-holes
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        Reporter:  Iceland_jack      |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by Ryan Scott <ryan.gl.scott@…>):

 In [changeset:"042c5930bff239337d21836db5b8d0ebf0180ffc/ghc"
 042c5930/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="042c5930bff239337d21836db5b8d0ebf0180ffc"
 Add test for #12589

 Commit af21e38855f7d517774542b360178b05045ecb08 fixed #12598. Let's add a
 test
 to make sure it stays fixed.
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12589#comment:5>
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