Fix rtt >= 0.0f assertion and free_move crash

src/network/connectionthreads.cpp

@@ -1167,7 +1167,7 @@ SharedBuffer<u8> ConnectionReceiveThread::handlePacketType_Control(Channel *chan
 
 				// a overflow is quite unlikely but as it'd result in major
 				// rtt miscalculation we handle it here
-				float rtt;
+				float rtt = 0.0f;
 				if (current_time > p.absolute_send_time) {
 					rtt = (current_time - p.absolute_send_time) / 1000.0f;
 				} else if (p.totaltime > 0) {
@@ -1176,6 +1176,7 @@ SharedBuffer<u8> ConnectionReceiveThread::handlePacketType_Control(Channel *chan
 
 				// Let peer calculate stuff according to it
 				// (avg_rtt and resend_timeout)
+				if (rtt != 0.0f)
 					dynamic_cast<UDPPeer *>(peer)->reportRTT(rtt);
 			}
 			// put bytes for max bandwidth calculation

src/player.cpp

@@ -76,22 +76,18 @@ Player::Player(const char *name, IItemDefManager *idef):
 	hud_hotbar_itemcount = HUD_HOTBAR_ITEMCOUNT_DEFAULT;
 
 	m_player_settings.readGlobalSettings();
-	g_settings->registerChangedCallback("free_move", &Player::settingsChangedCallback,
+	// Register player setting callbacks
-			&m_player_settings);
+	for (const std::string &name : m_player_settings.setting_names)
-	g_settings->registerChangedCallback("fast_move", &Player::settingsChangedCallback,
+		g_settings->registerChangedCallback(name,
-			&m_player_settings);
-	g_settings->registerChangedCallback("continuous_forward",
 			&Player::settingsChangedCallback, &m_player_settings);
-	g_settings->registerChangedCallback("always_fly_fast",
-			&Player::settingsChangedCallback, &m_player_settings);
-	g_settings->registerChangedCallback("aux1_descends",
-			&Player::settingsChangedCallback, &m_player_settings);
-	g_settings->registerChangedCallback(
-			"noclip", &Player::settingsChangedCallback, &m_player_settings);
 }
 
 Player::~Player()
 {
+	// m_player_settings becomes invalid, remove callbacks
+	for (const std::string &name : m_player_settings.setting_names)
+		g_settings->deregisterChangedCallback(name,
+			&Player::settingsChangedCallback, &m_player_settings);
 	clearHud();
 }
 

src/player.h

@@ -93,6 +93,10 @@ struct PlayerSettings
 	bool aux1_descends = false;
 	bool noclip = false;
 
+	const std::string setting_names[6] = {
+		"free_move", "fast_move", "continuous_forward", "always_fly_fast",
+		"aux1_descends", "noclip"
+	};
 	void readGlobalSettings();
 };