Zabbix agent crashes when running net.tcp.service check

Creating a Zabbix Agent (active) with key "net.tcp.service[dnsmasq]" results in a crashing Zabbix agent. After the crash, no child processes remain and the host isn't capable of being monitored.

Re-starting the agent results in an immediate crash.

Once I disable the check in the webinterface, the agent remains working.

Attached is what's written to the logfile.