Improve error handling for event filters

fixes #12621

lib/base/context.cpp

@@ -48,6 +48,9 @@ ContextTrace::ContextTrace(void)
 
 void ContextTrace::Print(std::ostream& fp) const
 {
+	if (m_Frames.empty())
+		return;
+
 	fp << std::endl;
 
 	int i = 0;

lib/base/debuginfo.cpp

@@ -62,7 +62,7 @@ void icinga::ShowCodeLocation(std::ostream& out, const DebugInfo& di, bool verbo
 	if (di.Path.IsEmpty())
 		return;
 
-	out << "Location: " << di << "\n";
+	out << "Location: " << di;
 
 	std::ifstream ifs;
 	ifs.open(di.Path.CStr(), std::ifstream::in);
@@ -71,6 +71,9 @@ void icinga::ShowCodeLocation(std::ostream& out, const DebugInfo& di, bool verbo
 	char line[1024];
 
 	while (ifs.good() && lineno <= di.LastLine + EXTRA_LINES) {
+		if (lineno == 0)
+			out << "\n";
+
 		lineno++;
 
 		ifs.getline(line, sizeof(line));

lib/remote/eventqueue.cpp

@@ -23,8 +23,8 @@
 
 using namespace icinga;
 
-EventQueue::EventQueue(void)
-    : m_Filter(NULL)
+EventQueue::EventQueue(const String& name)
+    : m_Name(name), m_Filter(NULL)
 { }
 
 EventQueue::~EventQueue(void)
@@ -44,8 +44,14 @@ void EventQueue::ProcessEvent(const Dictionary::Ptr& event)
 	ScriptFrame frame;
 	frame.Sandboxed = true;
 
+	try {
 		if (!FilterUtility::EvaluateFilter(frame, m_Filter, event, "event"))
 			return;
+	} catch (const std::exception& ex) {
+		Log(LogWarning, "EventQueue")
+		    << "Error occurred while evaluating event filter for queue '" << m_Name << "': " << DiagnosticInformation(ex);
+		return;
+	}
 
 	boost::mutex::scoped_lock lock(m_Mutex);
 

lib/remote/eventqueue.hpp

@@ -38,7 +38,7 @@ class I2_REMOTE_API EventQueue : public Object
 public:
 	DECLARE_PTR_TYPEDEFS(EventQueue);
 
-	EventQueue(void);
+	EventQueue(const String& name);
 	~EventQueue(void);
 
 	bool CanProcessEvent(const String& type) const;
@@ -59,6 +59,8 @@ public:
 	static void Unregister(const String& name);
 
 private:
+	String m_Name;
+
 	mutable boost::mutex m_Mutex;
 	boost::condition_variable m_CV;
 

lib/remote/eventshandler.cpp

@@ -75,7 +75,7 @@ bool EventsHandler::HandleRequest(const ApiUser::Ptr& user, HttpRequest& request
 	EventQueue::Ptr queue = EventQueue::GetByName(queueName);
 
 	if (!queue) {
-		queue = new EventQueue();
+		queue = new EventQueue(queueName);
 		EventQueue::Register(queueName, queue);
 	}