#40 Fix crash on Linux.

src/App.cpp

@@ -123,10 +123,10 @@ int App::exec()
 
 void App::close()
 {
-    uv_signal_stop(&m_signal);
-
     m_network->stop();
     Workers::stop();
+
+    uv_stop(uv_default_loop());
 }
 
 
@@ -150,5 +150,6 @@ void App::onSignal(uv_signal_t *handle, int signum)
         break;
     }
 
+    uv_signal_stop(handle);
     m_self->close();
 }