if err != nil {
			t.Fatal(err)
		}
		for _, addr := range addrs {
			switch addr := addr.(type) {
			case *IPNet:
				if addr.IP.To4() != nil {
					have = append(have, addr.String())
				}
				if addr.IP.To16() != nil && addr.IP.To4() == nil {
					// netsh does not output netmask for ipv6, so ignore ipv6 mask
					have = append(have, addr.IP.String())
				}
			case *IPAddr:

// R9 = addr of target function
TEXT	racecallatomic<>(SB), NOSPLIT, $0
	// Set up these registers
	// R0 = *ThreadState
	// R1 = caller pc
	// R2 = pc
	// R3 = addr of incoming arg list

	// Trigger SIGSEGV early.
	MOVD	40(RSP), R3	// 1st arg is addr. after two times BL, get it at 40(RSP)
	MOVB	(R3), R13	// segv here if addr is bad

TEXT	runtime·RaceRead(SB), NOSPLIT, $0-8
	// This needs to be a tail call, because raceread reads caller pc.
	JMP	runtime·raceread(SB)

// void runtime·racereadpc(void *addr, void *callpc, void *pc)
TEXT	runtime·racereadpc(SB), NOSPLIT, $0-24
	MOVQ	addr+0(FP), RARG1
	MOVQ	callpc+8(FP), RARG2
	MOVQ	pc+16(FP), RARG3
	ADDQ	$1, RARG3 // pc is function start, tsan wants return address

	// network address.
	Source Addr

	// Addr is the network address for which this error occurred.
	// For local operations, like Listen or SetDeadline, Addr is
	// the address of the local endpoint being manipulated.
	// For operations involving a remote network connection, like
	// Dial, Read, or Write, Addr is the remote address of that
	// connection.
	Addr Addr

				{
					itf:   net.Interface{Index: 0, MTU: 0, Name: "eth0", HardwareAddr: nil, Flags: 0},
					addrs: []net.Addr{&net.IPNet{IP: netutils.ParseIPSloppy("10.20.30.51"), Mask: net.CIDRMask(24, 32)}},
				},
				{
					itf:   net.Interface{Index: 2, MTU: 0, Name: "eth1", HardwareAddr: nil, Flags: 0},
					addrs: []net.Addr{&net.IPNet{IP: netutils.ParseIPSloppy("100.200.201.1"), Mask: net.CIDRMask(24, 32)}},
				},
			},

	switch {
	case ctx.IsSet("config-dir"):
		ctxt.ConfigDir = ctx.String("config-dir")
		ctxt.configDirSet = true
	case ctx.GlobalIsSet("config-dir"):
		ctxt.ConfigDir = ctx.GlobalString("config-dir")
		ctxt.configDirSet = true
	}

	switch {
	case ctx.IsSet("certs-dir"):
		ctxt.CertsDir = ctx.String("certs-dir")
		ctxt.certsDirSet = true
	case ctx.GlobalIsSet("certs-dir"):

		if len(f) < 2 {
			continue
		}
		addr := f[1]
		if i := bytealg.IndexByteString(addr, '!'); i >= 0 {
			addr = addr[:i] // remove port
		}
		if ParseIP(addr) == nil {
			continue
		}
		// only return unique addresses
		for _, a := range addrs {
			if a == addr {
				continue loop
			}
		}
		addrs = append(addrs, addr)
	}
	return
}

		var lastAddr, maxAddr uint64
		for i, inst := range insts {
			addr := inst.Addr + base

			// Guard against duplicate output from Disasm.
			if addr <= maxAddr {
				continue
			}
			maxAddr = addr

			length := 1
			if i+1 < len(insts) && insts[i+1].Addr > inst.Addr {
				// Extend to next instruction.
				length = int(insts[i+1].Addr - inst.Addr)
			}

			// Get inlined-call-stack for address.

func TestAppendPortIfNeeded(t *testing.T) {
	testCases := []struct {
		name   string
		addr   string
		port   int32
		expect string
	}{
		{
			name:   "IPv4 all-zeros bind address has port",
			addr:   "0.0.0.0:12345",
			port:   23456,
			expect: "0.0.0.0:12345",
		},
		{
			name:   "non-zeros IPv4 config",
			addr:   "9.8.7.6",
			port:   12345,
			expect: "9.8.7.6:12345",
		},
		{

        loadbalance
        kubernetes cluster.local in-addr.arpa ip6.arpa {
           pods insecure
           upstream
           fallthrough in-addr.arpa ip6.arpa
           ttl 30
        }
        health
    }
`,
			expectedCorefileData: `.:53 {
    errors
    health {
       lameduck 5s
    }
    ready
    kubernetes cluster.local in-addr.arpa ip6.arpa {
       pods insecure