Getting backtrace from qemu-kvm crash

When I'm running automated tests, qemu-kvm sometimes crashes and this needs to be debugged ASAP. To file a bug, I need a backtrace. As part of the test, the core which is dumped is saved.

1. SSH into the machine where qemu-kvm crashed
2. debuginfo-install qemu-kvm => This should install a bunch of packages to get a lot of symbol info. 
3. gdb /usr/libexec/qemu-kvm <path to core file>
4. Pass "thread apply all bt" to get the backtrace at the gdb prompt