func OnceFunc(f func()) func() {
	var (
		once  Once
		valid bool
		p     any
	)
	// Construct the inner closure just once to reduce costs on the fast path.
	g := func() {
		defer func() {
			p = recover()
			if !valid {
				// Re-panic immediately so on the first call the user gets a
				// complete stack trace into f.
				panic(p)
			}
		}()
		f()
		f = nil      // Do not keep f alive after invoking it.

	unsafe.Sizeof(a)		// ERROR "not used"

	close(c)
	copy(a, a)
	delete(m, 0)
	panic(0)
	print("foo")
	println("bar")
	recover()

	(close(c))
	(copy(a, a))
	(delete(m, 0))
	(panic(0))
	(print("foo"))
	(println("bar"))
	(recover())

	go append(a, 0)			// ERROR "not used|discards result"
	go cap(a)			// ERROR "not used|discards result"
	go complex(1, 2)		// ERROR "not used|discards result"

	go func() {
		v = 1
		close(c)
	}()
	func() {
		defer func() {
			recover()
		}()
		c <- 0
	}()
	v = 2
}

func TestRaceChanAsyncCloseSend(t *testing.T) {
	v := 0
	_ = v
	c := make(chan int, 10)
	go func() {
		v = 1
		close(c)
	}()
	func() {
		defer func() {
			recover()
		}()
		for {
			c <- 0
		}
	}()
	v = 2
}

	res := Applicative2(func(a int, b int) int {
		return 0
	})
	_ = res
}

type NoneType[T any] struct{}

func (r NoneType[T]) Recover() any {
	return nil
}

type Func2[A1, A2, R any] func(a1 A1, a2 A2) R

func Some[T any](v T) any {
	_ = Some2[T](v)
	return NoneType[T]{}.Recover()
}

//go:noinline
func Some2[T any](v T) any {
	return v
}

type Nil struct{}

	<-c
	time.Sleep(10 * time.Millisecond)
	go f2(c)
	<-c
}

func f1(done chan bool) {
	defer func() {
		recover()
		done <- true
		runtime.Goexit() // left stack-allocated Panic struct on gp->panic stack
	}()
	panic("p")
}

func f2(done chan bool) {
	defer func() {
		recover()
		done <- true
		runtime.Goexit()
	}()
	time.Sleep(10 * time.Millisecond) // overwrote Panic struct with Timer struct

		"runtime_test.TestSehUnwindDoublePanic.func1", "runtime.gopanic", "runtime_test.TestSehUnwindDoublePanic"}
	defer func() {
		defer func() {
			if recover() == nil {
				t.Fatal("did not panic")
			}
			pcs := sehCallers()
			testSehCallersEqual(t, pcs, want)
		}()
		if recover() == nil {
			t.Fatal("did not panic")
		}
		panic(2)
	}()
	panic(1)
}

func TestSehUnwindNilPointerPanic(t *testing.T) {

// about what was legal.

package main

import "runtime"

var p *int

func main() {
	func() {
		defer func() {
			runtime.GC()
			recover()
		}()
		var x [8192]byte
		func(x [8192]byte) {
			defer func() {
				if err := recover(); err != nil {
					println(*p)
				}
			}()
			println(*p)
		}(x)
	}()

fun retryTlsHandshake(e: IOException): Boolean {
  return when {
    // If there was a protocol problem, don't recover.
    e is ProtocolException -> false

    // If there was an interruption or timeout (SocketTimeoutException), don't recover.
    // For the socket connect timeout case we do not try the same host with a different
    // ConnectionSpec: we assume it is unreachable.

			float32 +
			float64 +
			imag +
			int +
			int8 +
			int16 +
			int32 +
			int64 +
			len +
			make +
			new +
			nil +
			panic +
			print +
			println +
			real +
			recover +
			rune +
			string +
			true +
			uint +
			uint8 +
			uint16 +
			uint32 +
			uint64 +
			uintptr +
			iota
	if n != NUM*(NUM-1)/2 {
		fmt.Println("BUG: wrong n", n, NUM*(NUM-1)/2)

! stdout 'no tests to run'
stdout '(?s)panic: die \[recovered\].*panic: die'
! stdout '(?s)panic: die \[recovered\].*panic: die.*panic: die'

! go test -v cleanup_failnow/panic_withcleanup_test.go
! stdout 'no tests to run'
stdout '(?s)panic: die \[recovered\].*panic: die'
! stdout '(?s)panic: die \[recovered\].*panic: die.*panic: die'

-- cleanup_failnow/panic_nocleanup_test.go --