Added the fix for #28 and also added a if condition to check validity of the color

src/Syntax.cpp

@@ -46,10 +46,40 @@ void Syntax::loadSyntaxRules(const YAML::Node &config)
         // Iterate through each rule in the category
         for (const auto &rule : rules)
         {
-            QString regex = QString::fromStdString(rule["regex"].as<std::string>());
-            QColor color(QString::fromStdString(rule["color"].as<std::string>()));
+
+            QString regex;
+            try
+            {
+                std::string regexStr = rule["regex"].as<std::string>(); //will throw exception if the key does not exist 
+                regex                = QString::fromStdString(regexStr);
+            }
+            catch(const YAML::Exception e)
+            {
+                qWarning() << " YAML exception when parsion the regex in syntax file" << e.what();
+                continue;
+            }
+
             qDebug() << "regex: " << regex;
 
+            QColor color;
+            try
+            {
+                std::string colorStr = rule["color"].as<std::string>();
+                color                = QColor(QString::fromStdString(colorStr));
+            }
+            catch(const YAML::Exception e)
+            {
+                qWarning() << " YAML exception when parsion the color in syntax file" << e.what();
+                continue;
+            }
+
+            //checks if the color is a valid color
+            if(!color.isValid())
+            {
+                qWarning() << "Invalid COlor : Skipping...";
+                continue;
+            }
+
             // Create a QTextCharFormat for the rule
             QTextCharFormat format;
             format.setForeground(color);