$ cat tests/test-v2v-o-openstack.sh.log 
...
+ virt-v2v --debug-gc -i libvirt -ic test:///var/tmp/virt-v2v-2.3.7/test-data/phony-guests/guests.xml windows -o openstack -on test -oo server-id=test -oo guest-id=guestid -oo verify-server-certificate=false -oo dev-disk-by-id=test-v2v-o-openstack.d
[   0.0] Setting up the source: -ic test:///var/tmp/virt-v2v-2.3.7/test-data/phony-guests/guests.xml -i libvirt windows
[   1.1] Opening the source
[  13.7] Inspecting the source
[  15.0] Checking for sufficient free disk space in the guest
[  15.0] Converting Microsoft Windows 7 Phony Edition to run on KVM
virt-v2v: warning: QEMU Guest Agent MSI not found on tools ISO/directory. You may want to install the guest agent manually after conversion.
Fatal error: allocation failure during minor GC
./test-v2v-o-openstack.sh: line 64: 2328563 Aborted                 (core dumped) $VG virt-v2v --debug-gc -i libvirt -ic "$libvirt_uri" windows -o openstack -on test -oo server-id=test -oo guest-id=guestid -oo verify-server-certificate=false -oo dev-disk-by-id=$d