patch applied (packages/base): withThread: block asynchronous exceptions before installing exception handler.

[Simon Marlow]

Mon Mar 29 06:16:24 PDT 2010  Bas van Dijk <v.dijk.bas at gmail.com>
  * withThread: block asynchronous exceptions before installing exception handler.
  Note that I don't unblock the given io computation. Because AFAICS
  withThread is only called with 'waitFd' which only performs an FFI
  call which can't receive asynchronous exceptions anyway.

    M ./Control/Concurrent.hs -1 +1

View patch online:
http://darcs.haskell.org/cgi-bin/darcsweb.cgi?r=packages/base;a=darcs_commitdiff;h=20100329131624-ae560-58c089b6e7ec744ac73a525b99dafeb271b1f58b.gz