},
		{
			ip:        mustIP("::1"),
			wantPanic: true,
		},
	}
	as4 := func(ip Addr) (v [4]byte, gotPanic bool) {
		defer func() {
			if recover() != nil {
				gotPanic = true
				return
			}
		}()
		v = ip.As4()
		return
	}
	for i, tt := range tests {
		got, gotPanic := as4(tt.ip)
		if gotPanic != tt.wantPanic {