[GHC] #9940: GHCi crashes when I hold down control-c for a short time, and then hold down any key that would normally result in typing.

30 Dec 2014

      #9940: GHCi crashes when I hold down control-c for a short time, and then hold
down any key that would normally result in typing.
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              Reporter:  Dingus            |             Owner:
                  Type:  bug               |            Status:  new
              Priority:  low               |         Milestone:
             Component:  Compiler          |           Version:  7.6.3
              Keywords:  crash, control-c  |  Operating System:  Windows
          Architecture:  x86_64 (amd64)    |   Type of failure:  GHCi crash
             Test Case:                    |        Blocked By:
              Blocking:                    |   Related Tickets:
Differential Revisions:                    |
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 This is printed: (without the quotes at the beginning or end)
 "
 ghc.exe: panic! (the 'impossible' happened)
   (GHC version 7.6.3 for i386-unknown-mingw32):
         thread blocked indefinitely in an MVar operation

 Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
 "

 I am able to reproduce it by:
 1. starting ghci (with no arguments, or a file as an argument)
 2. holding down contol-c for 2 seconds
 3. holding down spacebar/a letter key for 2 seconds
 The timing varies.

--
Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9940
GHC http://www.haskell.org/ghc/
The Glasgow Haskell Compiler