[GHC] #4245: ghci panic: thread blocked indefinitely in an MVar operation

[GHC]

#4245: ghci panic: thread blocked indefinitely in an MVar operation
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        Reporter:  pturnbull   |                Owner:  tibbe
            Type:  bug         |               Status:  new
        Priority:  normal      |            Milestone:
       Component:  GHCi        |              Version:  6.12.3
      Resolution:              |             Keywords:  MVar
Operating System:  MacOS X     |         Architecture:  x86_64 (amd64)
 Type of failure:  GHCi crash  |            Test Case:
      Blocked By:              |             Blocking:
 Related Tickets:              |  Differential Rev(s):
       Wiki Page:              |
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Comment (by George):

 I can't reproduce this on 8.4.1

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/4245#comment:36>
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