if len(a) != 1 || len(c) != 3 {
			bug()
			println("make call not ordered:", len(a), b, len(c))
		}
	}

	// real
	{
		x := 1 + 0i
		f := func() int { x = 3; return 2 }
		a, b, c := real(x), f(), real(x)
		if a != 1 || c != 3 {
			bug()
			println("real call not ordered:", a, b, c)
		}
	}
}

var bugged = false

func bug() {
	if !bugged {
		println("BUG")

)

const (
	rsCheckDeleteInterval = 1 * time.Minute
)

// listItem stores real server information and the process time.
// If nothing special happened, real server will be delete after process time.
type listItem struct {
	VirtualServer *utilipvs.VirtualServer
	RealServer    *utilipvs.RealServer
}

// String return the unique real server name(with virtual server information)
func (g *listItem) String() string {

package main

import (
	"fmt"
	"math"
)

func calike(a, b complex128) bool {
	if imag(a) != imag(b) && !(math.IsNaN(imag(a)) && math.IsNaN(imag(b))) {
		return false
	}

	if real(a) != real(b) && !(math.IsNaN(real(a)) && math.IsNaN(real(b))) {
		return false
	}

	return true
}

func main() {
	bad := false
	for _, t := range tests {
		x := t.f / t.g
		if !calike(x, t.out) {
			if !bad {

// license that can be found in the LICENSE file.

package cmplx

import "math"

// IsNaN reports whether either real(x) or imag(x) is NaN
// and neither is an infinity.
func IsNaN(x complex128) bool {
	switch {
	case math.IsInf(real(x), 0) || math.IsInf(imag(x), 0):
		return false
	case math.IsNaN(real(x)) || math.IsNaN(imag(x)):
		return true
	}
	return false
}

// NaN returns a complex “not-a-number” value.

// Sqrt returns the square root of x.
// The result r is chosen so that real(r) ≥ 0 and imag(r) has the same sign as imag(x).
func Sqrt(x complex128) complex128 {
	if imag(x) == 0 {
		// Ensure that imag(r) has the same sign as imag(x) for imag(x) == signed zero.
		if real(x) == 0 {
			return complex(0, imag(x))
		}
		if real(x) < 0 {
			return complex(0, math.Copysign(math.Sqrt(-real(x)), imag(x)))
		}
		return complex(math.Sqrt(real(x)), imag(x))

	}
	// Add real server to the virtual server
	for i := range rss {
		if err = fake.AddRealServer(vs, rss[i]); err != nil {
			t.Errorf("Fail to add real server, error: %v", err)
		}
	}
	// Delete a real server of the virtual server
	// Make sure any position of the list can be real deleted
	rssLen := len(rss)
	for i := range rss {
		// List all real servers of the virtual server

func Sin(x complex128) complex128 {
	switch re, im := real(x), imag(x); {
	case im == 0 && (math.IsInf(re, 0) || math.IsNaN(re)):
		return complex(math.NaN(), im)
	case math.IsInf(im, 0):
		switch {
		case re == 0:
			return x
		case math.IsInf(re, 0) || math.IsNaN(re):
			return complex(math.NaN(), im)
		}
	case re == 0 && math.IsNaN(im):
		return x
	}
	s, c := math.Sincos(real(x))
	sh, ch := sinhcosh(imag(x))

	defer make(map[string]int) // ERROR "defer discards result of make|is not used"
	defer new(int) // ERROR "defer discards result of new|is not used"
	defer real(1i) // ERROR "defer discards result of real|is not used"
	defer real(c) // ERROR "defer discards result of real|is not used"
	defer append(x, 1) // ERROR "defer discards result of append|is not used"
	defer append(x, 1) // ERROR "defer discards result of append|is not used"

type I interface {
	cplx() complex128
}

func main() {

	var t T

	if v := real(t.cplx()); v != 1 {
		panic("not-inlined complex call failed")
	}
	_ = imag(t.cplx())

	_ = real(t.cplx2())
	if v := imag(t.cplx2()); v != 1 {
		panic("potentially inlined complex call failed")
	}

	var i I
	i = t
	if v := real(i.cplx()); v != 1 {
		panic("potentially inlined complex call failed")
	}
	_ = imag(i.cplx())

	GetVirtualServers() ([]*VirtualServer, error)
	// AddRealServer creates the specified real server for the specified virtual server.
	AddRealServer(*VirtualServer, *RealServer) error
	// GetRealServers returns all real servers for the specified virtual server.
	GetRealServers(*VirtualServer) ([]*RealServer, error)
	// DeleteRealServer deletes the specified real server from the specified virtual server.
	DeleteRealServer(*VirtualServer, *RealServer) error