clang兼容msvc模式下，对异常支持有改进。但依然存在问题。

librf/src/state.inl

 			std::rethrow_exception(std::make_exception_ptr(future_exception{ error_code::not_ready }));
 			break;
 		case result_type::Exception:
-			std::rethrow_exception(std::move(this->_exception));
+			std::rethrow_exception(std::exchange(this->_exception, nullptr));
 			break;
 		default:
 			break;

test_librf.cpp

 extern void resumable_main_routine();
 extern void resumable_main_resumable();
 extern void resumable_main_mutex();
-extern void resumable_main_exception();
+extern void resumable_main_exception(bool bomb);
 extern void resumable_main_event();
 extern void resumable_main_event_v2();
 extern void resumable_main_event_timeout();
 	(void)argc;
 	(void)argv;
 
-	//test_async_cinatra_client();
-	//return 0;
+	resumable_main_exception(false);
+	return 0;
 
 	//if (argc > 1)
 	//	resumable_main_benchmark_asio_client(atoi(argv[1]));
 	resumable_main_yield_return();
 	resumable_main_resumable();
 	resumable_main_routine();
-	resumable_main_exception();
+	resumable_main_exception(false);
 	resumable_main_dynamic_go();
 	resumable_main_multi_thread();
 	resumable_main_timer();

tutorial/test_async_cb.cpp

 
 void resumable_main_cb()
 {
+	std::cout << __FUNCTION__ << std::endl;
 	//由于使用者可能不能明确的区分是resume function返回的awaitor还是awaitable function返回的awaitor
 	//导致均有可能加入到协程里去调度。
 	//所以，协程调度器应该需要能处理这种情况。

tutorial/test_async_exception.cpp

 			auto r = co_await async_signal_exception2(i);
 			std::cout << "result is " << r << std::endl;
 		}
-		catch (const std::exception& e)
+		catch (const std::exception& ex)
 		{
-			std::cout << "exception signal : " << e.what() << std::endl;
+			std::cout << "exception signal : " << ex.what() << std::endl;
 		}
 		catch (...)
 		{
 	}
 }
 
-void resumable_main_exception()
+void resumable_main_exception(bool bomb)
 {
+	std::cout << __FUNCTION__ << std::endl;
 	go test_signal_exception();
 	this_scheduler()->run_until_notask();
 
 	std::cout << std::endl;
-
-	go test_bomb_exception();
-	this_scheduler()->run_until_notask();
+	if (bomb)
+	{
+		go test_bomb_exception();
+		this_scheduler()->run_until_notask();
+	}
 }

tutorial/test_async_modern_cb.cpp

 
 void resumable_main_modern_cb()
 {
+	std::cout << __FUNCTION__ << std::endl;
 	example_future();
 	example_librf();
 }

tutorial/test_async_resumable.cpp

 
 void resumable_main_resumable()
 {
+	std::cout << __FUNCTION__ << std::endl;
 	resumable_switch(1, 99);
 
 	resumable_switch(1, 0);

tutorial/test_async_routine.cpp

 
 void resumable_main_routine()
 {
+	std::cout << __FUNCTION__ << std::endl;
 	//go test_routine_use_timer_2();
 #ifndef __GNUC__	//GCC: 没有提供__builtin_coro_frame这样的内置函数
 	go test_routine_use_timer();

tutorial/test_async_suspend_always.cpp

 
 void resumable_main_suspend_always()
 {
+	std::cout << __FUNCTION__ << std::endl;
 	go test_recursive_await();
 	go test_recursive_go();
 	this_scheduler()->run_until_notask();

tutorial/test_async_yield_return.cpp

 
 void resumable_main_yield_return()
 {
+	std::cout << __FUNCTION__ << std::endl;
 	for (int i : test_yield_int())
 	{
 		std::cout << i << " had return" << std::endl;