Hi,
libvirt segfaults for me when run in the foreground and pressing ctrl-c.
A bisect of the code lead me to this commit
commit 7c1119e3bbd483c52ae4cdfebe23dd179ad28124
Author: Daniel P. Berrange <berrange(a)redhat.com>
Date: Tue Aug 7 12:02:06 2012 +0100
Stefan