serf agent panic when -iface and -discover is given

[5aint2ero]

When starting serf agent via cmdline with the arguments -iface and -discover, the process stops with a panic.

Provided command:
serf agent -iface ens10 -discover swarm

Error message:

panic: reflect: call of reflect.Value.Int on zero Value

goroutine 33 [running]:
reflect.Value.Int(...)
        /goroot/src/reflect/value.go:961
github.com/hashicorp/go.net/ipv4.sysfd(0xa5b3a0, 0xc00000c7d0, 0xc00000c7d0, 0xa5b3a0, 0xc00000c7d0)
        /root/go/pkg/mod/github.com/hashicorp/go.net@v0.0.1/ipv4/helper_unix.go:46 +0x2ca
github.com/hashicorp/go.net/ipv4.(*dgramOpt).sysfd(0xc000077eb0, 0x95a0a0, 0x9a78e0, 0xc00012aa00)
        /root/go/pkg/mod/github.com/hashicorp/go.net@v0.0.1/ipv4/helper_unix.go:25 +0x7f
github.com/hashicorp/go.net/ipv4.(*dgramOpt).SetMulticastInterface(0xc000077eb0, 0xc00012a800, 0xc00000c7d0, 0xa5b3a0)
        /root/go/pkg/mod/github.com/hashicorp/go.net@v0.0.1/ipv4/dgramopt_posix.go:59 +0x43
github.com/hashicorp/mdns.(*client).setInterface(0xc00012aac0, 0xc00012a800, 0xc00012aac0, 0x5)
        /root/go/pkg/mod/github.com/hashicorp/mdns@v1.0.0/client.go:184 +0xe9
github.com/hashicorp/mdns.Query(0xc000387f80, 0x0, 0x0)
        /root/go/pkg/mod/github.com/hashicorp/mdns@v1.0.0/client.go:72 +0x10b
github.com/hashicorp/serf/cmd/serf/command/agent.(*AgentMDNS).poll(0xc00012a8c0, 0xc00033d740)
        /serf/cmd/serf/command/agent/mdns.go:127 +0xa4
created by github.com/hashicorp/serf/cmd/serf/command/agent.(*AgentMDNS).run
        /serf/cmd/serf/command/agent/mdns.go:115 +0x1f2

[phanirithvij]

related #571

[yangguoandresolution]

yes, I encouter with this problem also.