patch applied (ghc-6.12/packages/base): Fix bugs regarding asynchronous exceptions and laziness in Control.Concurrent.SampleVar

[Ian Lynagh]

Thu Mar 18 13:01:04 PDT 2010  Bas van Dijk <v.dijk.bas at gmail.com>
  * Fix bugs regarding asynchronous exceptions and laziness in Control.Concurrent.SampleVar
   - Block asynchronous exceptions at the right places
   - Force thunks before putting them in a MVar

    M ./Control/Concurrent/SampleVar.hs -13 +17

View patch online:
http://darcs.haskell.org/cgi-bin/darcsweb.cgi?r=ghc-6.12/packages/base;a=darcs_commitdiff;h=20100318200104-ae560-198e7c4d9f75457cb2ac255f43d698a8631d1968.gz