OperatorPanic Panic observed: runtime error: index out of range [0] with length 0

appeared in

https://prow.ci.openshift.org/view/gs/origin-ci-test/pr-logs/pull/openshift_oc/1264/pull-ci-openshift-oc-master-e2e-aws-upgrade/1580553009920741376

but looking more I found a few more places where this appeared:

https://search.ci.openshift.org/?search=Panic+observed%3A+runtime+error%3A+index+out+of+range&maxAge=48h&context=1&type=bug%2Bissue%2Bjunit&name=&excludeName=&maxMatches=5&maxBytes=20971520&groupBy=job

returns:

• https://prow.ci.openshift.org/job-history/origin-ci-test/pr-logs/directory/pull-ci-openshift-kubernetes-master-e2e-azure-upgrade
• https://prow.ci.openshift.org/job-history/origin-ci-test/pr-logs/directory/pull-ci-openshift-ovn-kubernetes-master-4.12-upgrade-from-stable-4.11-e2e-aws-ovn-upgrade
• https://prow.ci.openshift.org/job-history/origin-ci-test/pr-logs/directory/pull-ci-openshift-console-operator-master-e2e-agnostic-upgrade

quick fix (still in progress) : https://github.com/openshift/cluster-network-operator/pull/1588