[6.6.1] virsh fails to parse JSON (upstream)

root@Tower:~# virsh dommemstat 15
error: Failed to get memory statistics for domain 15
error: internal error: failed to parse JSON 1:63: too big integer near '18446744073709551615'

I am posting this so anyone running into this same issue while using virsh commands can see the reason for the error.

Once the error occurs, starting, stopping and managing virtual machines using virsh can break (even when using the Web GUI).

Further information can be found here: https://bugzilla.redhat.com/show_bug.cgi?id=1614569