Tidy.

src/gui/imagerpanel.cc

@@ -74,7 +74,6 @@ private:
 
     void OnQueueFailed() override
     {
-        fmt::print("queue failed\n");
         if (_state == STATE_READING_WORKING)
             _state = STATE_READING_FAILED;
         else if (_state == STATE_WRITING_WORKING)

src/gui/main.cc

@@ -75,6 +75,11 @@ wxThread::ExitCode FluxEngineApp::Entry()
     {
         Logger() << EmergencyStopMessage();
     }
+	catch (const std::exception& e)
+	{
+		Logger() << ErrorLogMessage{
+		fmt::format("unhandled exception: {}\n", e.what())};
+	}
 
     postToUiThread(
         [&]