[Libguestfs] error/crash on mount

Hi, I am having issues with libguestfs; I am unable to mount a disk either from cli or via python bindings. This was working previously, but in order to have access to python3.5 I am trying to upgrade from Debian 8/Jessie to Debian 9/Stretch. Unfortunately the libguestfs error is getting in the way. Output of libguestfs-test-tool is attached as per libguestfs.org help. My current environment: aphrodite@cleopatra:~$ uname -a Linux cleopatra 4.9.0-3-amd64 #1 SMP Debian 4.9.30-2+deb9u3 (2017-08-06) x86_64 GNU/Linux aphrodite@cleopatra:~$ /usr/local/sbin/libvirtd --version /usr/local/sbin/libvirtd (libvirt) 3.1.0 aphrodite@cleopatra:~$ /usr/bin/guestmount --version guestmount 1.34.6 Please let me know if there is a way I can continue in Stretch - if necessary I can roll back to Jessie but I really want to get everything working in Stretch if I can. Thank you in advance for your time, http_error_418