func goexitSeq() Seq[int] {
	return func(yield func(int) bool) {
		runtime.Goexit()
	}
}

func goexitCleanupSeq() Seq[int] {
	return func(yield func(int) bool) {
		for {
			if !yield(55) {
				runtime.Goexit()
			}
		}
	}
}

func TestPull2Goexit(t *testing.T) {
	t.Run("next", func(t *testing.T) {
		var next func() (int, int, bool)
		var stop func()
		if !goexits(t, func() {

			// Propagate panics and goexits from seq.
			if panicValue != nil {
				if panicValue == goexitPanicValue {
					// Propagate runtime.Goexit from seq.
					runtime.Goexit()
				} else {
					panic(panicValue)
				}
			}
		}
	}
	return next, stop
}

// goexitPanicValue is a sentinel value indicating that an iterator
// exited via runtime.Goexit.

	if ns == 0 {
		return scratch
	}
	return ns
}

var goexits = []byte("go: exit ")
var emptystatus = []byte("\x00")
var exiting uint32

func goexitsall(status *byte) {
	var buf [_ERRMAX]byte
	if !atomic.Cas(&exiting, 0, 1) {
		return
	}
	getg().m.locks++
	n := copy(buf[:], goexits)
	n = copy(buf[n:], gostringnocopy(status))
	pid := getpid()

// If all other goroutines exit, the program crashes.
func Goexit() {
	// Create a panic object for Goexit, so we can recognize when it might be
	// bypassed by a recover().
	var p _panic
	p.goexit = true

	p.start(getcallerpc(), unsafe.Pointer(getcallersp()))
	for {
		fn, ok := p.nextDefer()
		if !ok {
			break
		}
		fn()
	}

	goexit1()
}

type neverCallThisFunction struct{}

// goexit is the return stub at the top of every goroutine call stack.
// Each goroutine stack is constructed as if goexit called the
// goroutine's entry point function, so that when the entry point
// function returns, it will return to goexit, which will call goexit1
// to perform the actual exit.
//
// This function must never be called directly. Call goexit1 instead.

	// immediately) to unexpectedly block on reading from the pipe.
	var (
		nHangs       = runtime.GOMAXPROCS(0)
		nExits       = runtime.GOMAXPROCS(0)
		hangs, exits sync.WaitGroup
	)
	hangs.Add(nHangs)
	exits.Add(nExits)

	// ready is done when the goroutines have done as much work as possible to
	// prepare to create subprocesses. It isn't strictly necessary for the test,

	// goroutines for test
	"testing.Main(",
	"testing.tRunner(",
	"testing.(*M).",

	// go runtime
	"runtime.goexit",
	"created by runtime.gc",
	"runtime.MHeap_Scavenger",
	"signal.signal_recv",
	"sigterm.handler",
	"runtime_mcall",

	// created by leak checker
	"created by runtime/trace.Start",
	"interestingGoroutines",

	testCases := []struct {
		desc  string
		flags []string
		want  string
	}{
		{
			desc:  "Issue 48502: call runtime.Goexit in t.Cleanup after panic",
			flags: []string{"-test.run=^TestGoexitInCleanupAfterPanicHelper$"},
			want: `panic: die
	panic: test executed panic(nil) or runtime.Goexit`,
		},
		{
			desc:  "Issue 48515: call t.Run in t.Cleanup should trigger panic",

	"corostart":          abi.FuncID_corostart,
	"debugCallV2":        abi.FuncID_debugCallV2,
	"gcBgMarkWorker":     abi.FuncID_gcBgMarkWorker,
	"rt0_go":             abi.FuncID_rt0_go,
	"goexit":             abi.FuncID_goexit,
	"gogo":               abi.FuncID_gogo,
	"gopanic":            abi.FuncID_gopanic,
	"handleAsyncEvent":   abi.FuncID_handleAsyncEvent,
	"main":               abi.FuncID_runtime_main,

	18: {exits: [10]int{down: 16, east: 19, west: 18, up: 22}},
	19: {exits: [10]int{up: 29, west: 18, ne: 15, east: 20, south: 30}},
	20: {exits: [10]int{ne: 19, west: 20, se: 21}},
	21: {exits: [10]int{north: 20}}, // Dead End
	22: {exits: [10]int{north: 18, east: 24, down: 23, south: 28, west: 26, nw: 22}},
	23: {exits: [10]int{east: 22, west: 28, up: 24}},
	24: {exits: [10]int{ne: 25, down: 23, nw: 28, sw: 26}},