[GHC] #13832: No parameter-validation in Control.Concurrent.setNumCapabilities

[GHC]

#13832: No parameter-validation in Control.Concurrent.setNumCapabilities
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        Reporter:  AlistairWard      |                Owner:  (none)
            Type:  bug               |               Status:  closed
        Priority:  low               |            Milestone:  8.2.1
       Component:  Core Libraries    |              Version:  8.0.1
      Resolution:  fixed             |             Keywords:
                                     |  setNumCapabilities
Operating System:  Linux             |         Architecture:  x86
 Type of failure:  Runtime crash     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by Ben Gamari <ben@…>):

 In [changeset:"b9f9670c8cf4eac8798a8cb3e683d0411f9e94ec/ghc" b9f9670/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="b9f9670c8cf4eac8798a8cb3e683d0411f9e94ec"
 rts: Ensure that new capability count is > 0

 The Haskell wrapper already checks this but we should also check it in the
 RTS
 to catch non-Haskell callers. See #13832.
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13832#comment:5>
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