X-Git-Url: http://sigrok.org/gitweb/?a=blobdiff_plain;f=pv%2Fviews%2Ftrace%2Fview.cpp;h=a1a163b05aeb649b446a2e19596602fe3b7238dc;hb=b0773a8aa01735d7220284ab7a3e8b5d02b48e9e;hp=e2d9365efaf12d4c09a8a3df9b3891dd9ab38e94;hpb=4b018bf1eeed0f7b80120d41d7881673a2f29e61;p=pulseview.git

diff --git a/pv/views/trace/view.cpp b/pv/views/trace/view.cpp
index e2d9365e..a1a163b0 100644
--- a/pv/views/trace/view.cpp
+++ b/pv/views/trace/view.cpp
@@ -365,6 +365,10 @@ void View::add_signalbase(const shared_ptr<data::SignalBase> signalbase)
 		signal = shared_ptr<Signal>(new AnalogSignal(session_, signalbase));
 		break;
 
+	case SignalBase::MathChannel:
+		signal = shared_ptr<Signal>(new AnalogSignal(session_, signalbase));
+		break;
+
 	default:
 		qDebug() << "Unknown signalbase type:" << signalbase->type();
 		assert(false);
@@ -929,7 +933,7 @@ pair<Timestamp, Timestamp> View::get_time_extents() const
 		return make_pair(0, 0);
 
 	for (shared_ptr<Signal> s : signals_)
-		if (s->data()->segments().size() > 0)
+		if (s->data() && (s->data()->segments().size() > 0))
 			data.push_back(s->data());
 
 	for (const shared_ptr<SignalData>& d : data) {