[GHC] #8687: Strange closure type 9983

[GHC]

#8687: Strange closure type 9983
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       Reporter:  nh2               |             Owner:
           Type:  bug               |            Status:  new
       Priority:  normal            |         Milestone:
      Component:  Compiler          |           Version:  7.6.3
       Keywords:                    |  Operating System:  Windows
   Architecture:  Unknown/Multiple  |   Type of failure:  GHCi crash
     Difficulty:  Unknown           |         Test Case:
     Blocked By:                    |          Blocking:
Related Tickets:                    |
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 {{{
 *Main> :main C:\\Windows\\Media\\onestop.mid
 <interactive>: internal error: evacuate: strange closure type 9983
     (GHC version 7.6.3 for i386_unknown_mingw32)
     Please report this as a GHC bug:
 http://www.haskell.org/ghc/reportabug

 This application has requested the Runtime to terminate it in an unusual
 way.
 Please contact the application's support team for more information.
 }}}

 This happened to me on {{{ghci playmidi.hs}}} from the {{{examples/}}}
 folder of {{{http://hackage.haskell.org/package/hmidi-0.2.1.0}}}
 (downloaded the tar and fixed the parsec import, removing the
 {{{"parsec2"}}} package import and fixing a type checking error, replacing
 {{{selectOutputDevice Nothing}}} by {{{selectOutputDevice "Select midi
 output device" Nothing}}}.

 (We also fixed those compile errors at
 https://github.com/vahokif/hmidi/tree/2124a8.)

 I have not been able to reproduce it since the first time :(

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8687>
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