src: crash fixes

* fixed crash when snippet has no code.
* fixed crash when saving a filenode with special characters in its name
* fixed crash when aborting the parsing

src/lib/utility/scheduling/TaskGroupParallel.cpp

@@ -23,7 +23,7 @@ Task::TaskState TaskGroupParallel::update()
 	{
 		for (size_t i = 0; i < m_tasks.size(); i++)
 		{
-			std::thread(&TaskGroupParallel::processTask, this, m_tasks[i]).detach();
+			m_threads.push_back(std::thread(&TaskGroupParallel::processTask, this, m_tasks[i]));
 
 			std::lock_guard<std::mutex> lock(m_activeTaskCountMutex);
 			m_activeTaskCount++;
@@ -47,6 +47,11 @@ Task::TaskState TaskGroupParallel::update()
 
 void TaskGroupParallel::exit()
 {
+	for (size_t i = 0; i < m_threads.size(); i++)
+	{
+		m_threads[i].join();
+	}
+	m_threads.clear();
 }
 
 void TaskGroupParallel::interrupt()

src/lib/utility/scheduling/TaskGroupParallel.h

@@ -23,6 +23,9 @@ private:
 
 	volatile bool m_interrupt;
 	bool m_running;
+
+	std::vector<std::thread> m_threads;
+
 	volatile int m_activeTaskCount;
 	std::mutex m_activeTaskCountMutex;
 };