s = C.GoStringN((*C.char)(C.api_hello), C.int(6))
	var b []byte
	b = C.GoBytes(unsafe.Pointer(C.api_hello), C.int(6))
	_, _ = s, b
	C.cstring_pointer_fun(nil)
}

// issue 18126

func test18126(t *testing.T) {
	p := C.malloc(1)
	_, err := C.Issue18126C(&p)
	C.free(p)
	_ = err
}

// issue 18720

func test18720(t *testing.T) {

	defer func() {
		for _, cmd := range cmds {
			cmd.Process.Kill()
		}
	}()

	args := append(append([]string(nil), os.Args[1:]...), "-test.run=^Test18146$")
	for n := attempts; n > 0; n-- {
		cmd := exec.Command(os.Args[0], args...)
		cmd.Env = append(os.Environ(), "test18146=exec")
		buf := bytes.NewBuffer(nil)
		cmd.Stdout = buf
		cmd.Stderr = buf
		if err := cmd.Start(); err != nil {