X-Git-Url: http://git.code-monkey.de/?a=blobdiff_plain;f=pv%2Fsession.cpp;h=542b88b798188696eabc216947065bf5f43c06ce;hb=c6412b47eb1f5529fd76247caa7de09b6c9693d5;hp=d5126660f56b140d2337d64b1df625a4ea44b148;hpb=3084ed4b15663dd717ff656745db305f377ab215;p=pulseview.git

diff --git a/pv/session.cpp b/pv/session.cpp
index d512666..542b88b 100644
--- a/pv/session.cpp
+++ b/pv/session.cpp
@@ -306,8 +306,15 @@ void Session::update_signals(shared_ptr<devices::Device> device)
 	assert(device);
 	assert(capture_state_ == Stopped);
 
+	const shared_ptr<sigrok::Device> sr_dev = device->device();
+	if (!sr_dev) {
+		signals_.clear();
+		logic_data_.reset();
+		return;
+	}
+
 	// Detect what data types we will receive
-	auto channels = device->device()->channels();
+	auto channels = sr_dev->channels();
 	unsigned int logic_channel_count = std::count_if(
 		channels.begin(), channels.end(),
 		[] (shared_ptr<Channel> channel) {
@@ -334,7 +341,7 @@ void Session::update_signals(shared_ptr<devices::Device> device)
 		unordered_set< shared_ptr<view::Signal> > prev_sigs(signals_);
 		signals_.clear();
 
-		for (auto channel : device->device()->channels()) {
+		for (auto channel : sr_dev->channels()) {
 			shared_ptr<view::Signal> signal;
 
 			// Find the channel in the old signals
@@ -400,7 +407,12 @@ shared_ptr<view::Signal> Session::signal_from_channel(
 void Session::read_sample_rate(shared_ptr<sigrok::Device> device)
 {
 	assert(device);
-	const auto keys = device->config_keys(ConfigKey::DEVICE_OPTIONS);
+	map< const ConfigKey*, set<sigrok::Capability> > keys;
+
+	try {
+		keys = device->config_keys(ConfigKey::DEVICE_OPTIONS);
+	} catch (const Error) {}
+
 	const auto iter = keys.find(ConfigKey::SAMPLERATE);
 	cur_samplerate_ = (iter != keys.end() &&
 		(*iter).second.find(sigrok::GET) != (*iter).second.end()) ?