Comment 5 for bug 2016427

Here is a simpler reproducer with a single file:

cat > /etc/netplan/90-vrf.yaml <<EOF
network:
  vrfs:
    vrf20:
      table: 20
      routes:
        - to: 1.2.3.0/24
          via: 1.2.3.4
EOF

# netplan get
Segmentation fault (core dumped)

The problem is that we try to walk through the list of routing-policies without checking if we have items in the list.