[GHC] #12226: C-c does not force kill hung GHC processes

[GHC]

#12226: C-c does not force kill hung GHC processes
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           Reporter:  ezyang         |             Owner:
               Type:  bug            |            Status:  new
           Priority:  low            |         Milestone:
          Component:  Test Suite     |           Version:  8.0.1
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  None/Unknown
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
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 By default the test timeout is 300sec. One common thing to have occur is
 you get GHC in an infinite loop, and now a test won't terminate. So you do
 the obvious thing and C-c the test script. BUT LITTLE DO YOU KNOW, the GHC
 process is still hanging around.

 So, Python should probably force kill its subprocesses as its quitting,
 rather than hope that the SIGHUP will reap them. Timeouts DO kill
 properly, which is nice.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12226>
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