Comment 0 for bug 1789862

I want to add a link local route to an interface.
Config looks like this:
network:
    ethernets:
        ens192:
            addresses:
            - 172.16.4.131/24
            # gateway4: 172.16.4.1
            nameservers:
                addresses: []
                search: []
            optional: true
            routing-policy:
                - from: 172.16.4.0/24
                  table: 200
            routes:
                - to: 0.0.0.0/0
                  via: 172.16.4.1
                  table: 200
                  metric: 1
        ens224:
            addresses:
            - 10.0.0.31/24
            gateway4: 10.0.0.1
            nameservers:
                addresses:
                - 10.3.6.11
                - 10.3.6.12
                search:
                - feusi-root.ch
            optional: true
    version: 2

Unfortunately this means I cannot reach 172.16.4.0/24

I now add this route to ens192:

                - to: 172.16.4.0/24
                  scope: link
                  metric: 1

But netplan apply fails with: "unicast route must include both a 'to' and 'via' IP"
How should i give a "via" to a route with the scope link?