patch applied (packages/base): Fix #4533 - unregister callbacks on exception, fixing a memory leak

[Ian Lynagh]

Sat Nov 27 10:18:26 PST 2010  Bryan O'Sullivan <bos at serpentine.com>
  * Fix #4533 - unregister callbacks on exception, fixing a memory leak
  
  Our problem here was that if a thread blocked in threadWait or
  threadDelay and was killed by an exception thrown from another thread,
  its registration with the IO manager would not be cleared.
  
  The fix is simply to install exception handlers that do the cleanup and
  propagate the exception.
  

    M ./System/Event/Thread.hs -4 +7

View patch online:
http://darcs.haskell.org/cgi-bin/darcsweb.cgi?r=packages/base;a=darcs_commitdiff;h=20101127181826-00f12-c6995e46de1e70fa37477f35a52b4d5852ba0912.gz