diff --git bauer/vehikelbauer.cc bauer/vehikelbauer.cc
index 13dac2a9d..1763a361d 100644
--- bauer/vehikelbauer.cc
+++ bauer/vehikelbauer.cc
@@ -251,6 +251,7 @@ static bool compare_vehicles(const vehicle_desc_t* a, const vehicle_desc_t* b)
 		case depot_frame_t::sb_price:
 			cmp = compare_price(a, b);
 			if (cmp != 0) return cmp < 0;
+			// fallthrough
 		case depot_frame_t::sb_cost:
 			cmp = compare_cost(a, b);
 			if (cmp != 0) return cmp < 0;
@@ -276,6 +277,7 @@ static bool compare_vehicles(const vehicle_desc_t* a, const vehicle_desc_t* b)
 		case depot_frame_t::sb_intro_date:
 			cmp = compare_intro_year_month(a, b);
 			if (cmp != 0) return cmp < 0;
+			// fallthrough
 		case depot_frame_t::sb_retire_date:
 			cmp = compare_retire_year_month(a, b);
 			if (cmp != 0) return cmp < 0;
@@ -581,9 +583,9 @@ sint32 vehicle_builder_t::get_fastest_vehicle_speed(waytype_t wt, uint16 const m
 
 	FOR(slist_tpl<vehicle_desc_t const*>, const vehicle_descriptor, typ_fahrzeuge[0][GET_WAYTYPE_INDEX(wt)]) {
 		if (vehicle_descriptor->get_power() == 0 ||
-			use_timeline && (
+			(use_timeline && (
 				vehicle_descriptor->is_future(month_now) ||
-				!allow_obsolete && vehicle_descriptor->is_retired(month_now))) {
+				(!allow_obsolete && vehicle_descriptor->is_retired(month_now))))) {
 			continue;
 		}
 
diff --git descriptor/building_desc.cc descriptor/building_desc.cc
index beceb1768..4768101a0 100644
--- descriptor/building_desc.cc
+++ descriptor/building_desc.cc
@@ -216,6 +216,7 @@ sint32 building_desc_t::get_price(karte_t *world) const
 					case water_wt:       return -s.cst_multiply_dock * get_level();
 					case air_wt:         return -s.cst_multiply_airterminal * get_level();
 					case 0:              return -s.cst_multiply_post * get_level();
+					default:             return 0;
 				}
 			case depot:
 				switch(get_extra()) {
diff --git display/scr_coord.h display/scr_coord.h
index 071e6da72..45244b602 100644
--- display/scr_coord.h
+++ display/scr_coord.h
@@ -111,6 +111,8 @@ public:
 	scr_size( scr_coord_val w_par, scr_coord_val h_par) { w = w_par; h = h_par; }
 	scr_size( const scr_size& size ) { w = size.w; h=size.h; }
 
+	scr_size operator=(const scr_size &rhs) { w=rhs.w; h=rhs.h; return *this; }
+
 	operator scr_coord() const { return scr_coord(w,h); }
 
 	bool operator ==(const scr_size& other) const { return ((w-other.w) | (h-other.h)) == 0; }
diff --git network/network_address.cc network/network_address.cc
index 81d7abbdd..8b291bf47 100644
--- network/network_address.cc
+++ network/network_address.cc
@@ -43,6 +43,16 @@ net_address_t::net_address_t(const net_address_t &other)
 }
 
 
+net_address_t &net_address_t::operator=(const net_address_t &rhs)
+{
+	ip = rhs.ip;
+	mask = rhs.mask;
+	ipstr[0] = '\0';
+	init_ipstr();
+	return *this;
+}
+
+
 void net_address_t::init_ipstr()
 {
 	if (  ipstr[0] == '\0'  ) {
diff --git network/network_address.h network/network_address.h
index ced2ba277..c2a60a2b9 100644
--- network/network_address.h
+++ network/network_address.h
@@ -26,6 +26,8 @@ public:
 
 	net_address_t(const net_address_t&);
 
+	net_address_t &operator=(const net_address_t &rhs);
+
 	bool matches(const net_address_t &other) const {
 		return (other.ip & mask)==(ip & mask);
 	}
diff --git tpl/quickstone_tpl.h tpl/quickstone_tpl.h
index 5b2a69566..f940ace4b 100644
--- tpl/quickstone_tpl.h
+++ tpl/quickstone_tpl.h
@@ -257,6 +257,8 @@ public:
 
 	bool operator!= (const quickstone_tpl<T> &other) const { return entry != other.entry; }
 
+	quickstone_tpl<T> &operator=(const quickstone_tpl<T> &rhs) { entry = rhs.entry; return *this; }
+
 	static uint16 get_size() { return size; }
 
 	/**