I am using topology where VMs are connected to VPP through tap ports. This tap port however does not need to have IP address assigned. When I am try to setup this tap port as NAT inbound port with first packet received VPP crash every time until IP address is assigned (can be completely random address).

My VPP setup:
sudo vppctl set interface state GigabitEthernet0/9/0 up
sudo vppctl set interface ip address GigabitEthernet0/9/0 10.101.0.1/24
sudo vppctl set interface state GigabitEthernet0/a/0 up
sudo vppctl set interface ip address GigabitEthernet0/a/0 200.10.0.2/24
sudo vppctl ip route add table 0 10.100.0.2/32 via tap-0
sudo vppctl ip route add table 0 10.100.0.3/32 via tap-1
sudo vppctl ip route add 10.100.1.0/24 table 0 via 10.101.0.2 GigabitEthernet0/9/0
sudo vppctl ip route add 10.100.2.0/24 table 0 via 10.101.0.3 GigabitEthernet0/9/0
sudo vppctl ip route add 0.0.0.0/0 table 0 via 200.10.0.1 GigabitEthernet0/a/0
sudo vppctl set ip arp tap-0 10.100.0.2 00:00:00:00:00:02
sudo vppctl set ip arp tap-1 10.100.0.3 00:00:00:00:00:03
sudo vppctl set ip arp proxy 10.100.0.1 - 10.100.0.3
sudo vppctl set int proxy-arp tap-0 enable
sudo vppctl set int proxy-arp tap-1 enable
sudo vppctl set interface snat in tap-0 out GigabitEthernet0/a/0
sudo vppctl set interface snat in tap-1 out GigabitEthernet0/a/0
sudo vppctl snat add static mapping local 10.100.0.2 external 200.10.0.100
sudo vppctl snat add static mapping local 10.100.0.3 external 200.10.0.101