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/data/SqliteStorage.cpp

@@ -112,11 +112,14 @@ Id SqliteStorage::addNode(int type, const std::string& serializedName, int defin
 	);
 	Id id = m_database.lastRowId();
 
-	m_database.execDML((
+	CppSQLite3Statement stmt = m_database.compileStatement((
 		"INSERT INTO node(id, type, serialized_name, definition_type) VALUES("
-		+ std::to_string(id) + ", " + std::to_string(type) + ", '" + serializedName + "', " + std::to_string(definitionType) + ");"
+		+ std::to_string(id) + ", " + std::to_string(type) + ", ?, " + std::to_string(definitionType) + ");"
 	).c_str());
 
+	stmt.bind(1, serializedName.c_str());
+	stmt.execDML();
+
 	return id;
 }
 
@@ -438,7 +441,27 @@ StorageNode SqliteStorage::getNodeById(Id id) const
 
 StorageNode SqliteStorage::getNodeBySerializedName(const std::string& serializedName) const
 {
-	return getFirst<StorageNode>("WHERE serialized_name == '" + serializedName + "'");
+	CppSQLite3Statement stmt = m_database.compileStatement(
+		"SELECT id, type, serialized_name, definition_type FROM node WHERE serialized_name == ? LIMIT 1;"
+	);
+
+	stmt.bind(1, serializedName.c_str());
+	CppSQLite3Query q = stmt.execQuery();
+
+	if (!q.eof())
+	{
+		const Id id = q.getIntField(0, 0);
+		const int type = q.getIntField(1, -1);
+		const std::string serializedName = q.getStringField(2, "");
+		const int definitionType = q.getIntField(3, 0);
+
+		if (id != 0 && type != -1)
+		{
+			return StorageNode(id, type, serializedName, definitionType);
+		}
+	}
+
+	return StorageNode();
 }
 
 std::vector<StorageNode> SqliteStorage::getNodesByIds(const std::vector<Id>& nodeIds) const

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;
 };

src/lib_gui/qt/element/QtCodeArea.cpp

@@ -110,7 +110,7 @@ QtCodeArea::QtCodeArea(
 	m_highlighter = new QtHighlighter(document());
 
 	std::string displayCode = m_code;
-	if (*displayCode.rbegin() == '\n')
+	if (!displayCode.empty() && *displayCode.rbegin() == '\n')
 	{
 		displayCode.pop_back();
 	}