fix memory leak that widgets wouldn't be deleted

source/gui/detail/bedrock_posix.cpp

@@ -1193,6 +1193,14 @@ namespace detail
 			native_interface::enable_window(owner_native, true);
 		}
 
+		//Before exit of pump_event, it should call the remove_trash_handle.
+		//Under Linux, if the windows are closed in other threads, all the widgets handles
+		//will be marked as deleted after exit of the event loop and in other threads. So the 
+		//handle should be deleted from trash before exit the pump_event.
+		auto thread_id = ::nana::system::this_thread_id();
+		wd_manager().call_safe_place(thread_id);
+		wd_manager().remove_trash_handle(thread_id);
+
 		lock.forward();
 
 		if(0 == --(context->event_pump_ref_count))

source/gui/wvl.cpp

@@ -28,6 +28,8 @@ namespace nana
 		}
 	}
 
+#ifdef NANA_AUTOMATIC_GUI_TESTING
+
 	void click(widget& w)
 	{
 		std::cout << "Automatically clicking widget "<<w.caption()<<":\n";
@@ -41,11 +43,11 @@ namespace nana
 	{
 		if (!wait) return;
 		std::cout << "waiting " << wait << " sec...\n";
-#ifdef STD_THREAD_NOT_SUPPORTED
+#	ifdef STD_THREAD_NOT_SUPPORTED
 		boost::this_thread::sleep_for(boost::chrono::seconds{ wait });
-#else
+#	else
 		std::this_thread::sleep_for(std::chrono::seconds{ wait });
-#endif
+#	endif
 	}
 
 	void pump()
@@ -61,7 +63,6 @@ namespace nana
 		std::function<void()>f // = {}      ///< emit events to mimics user actions and may asert results
 	)
 	{
-	#ifdef NANA_AUTOMATIC_GUI_TESTING
 			
 	    std::cout << "Will wait " << wait << " sec...\n";
 
@@ -87,13 +88,12 @@ namespace nana
 		pump();
 		if (t.joinable())
 			t.join();
-
-	#else
-		static_cast<void>(wait);
-		static_cast<void>(wait_end);
-		static_cast<void>(f); //to eliminte unused parameter compiler warning.
-
-		pump();
-	#endif
 	}
+#else
+	void exec()
+	{
+		internal_scope_guard lock;
+		detail::bedrock::instance().pump_event(nullptr, false);
+	}
+#endif
 }//end namespace nana