Check that LuaEntitySAO::setVelocity is not NaN

src/content_sao.cpp

@@ -617,6 +617,9 @@ void LuaEntitySAO::notifyObjectPropertiesModified()
 
 void LuaEntitySAO::setVelocity(v3f velocity)
 {
+	if(util_isnan(velocity.X) || util_isnan(velocity.Y) ||
+			util_isnan(velocity.Z))
+		throw BaseException("LuaEntitySAO::setVelocity(): Given value is NaN");
 	m_velocity = velocity;
 }
 

src/script/common/c_converter.cpp

@@ -179,6 +179,12 @@ v3f check_v3f(lua_State *L, int index)
 	CHECK_POS_COORD("z");
 	pos.Z = lua_tonumber(L, -1);
 	lua_pop(L, 1);
+	if(util_isnan(pos.X))
+		throw LuaError("NaN passed as X coordinate");
+	if(util_isnan(pos.Y))
+		throw LuaError("NaN passed as Y coordinate");
+	if(util_isnan(pos.Z))
+		throw LuaError("NaN passed as Z coordinate");
 	return pos;
 }
 

src/util/numeric.h

@@ -416,4 +416,6 @@ inline u32 npot2(u32 orig) {
 	return orig + 1;
 }
 
+#define util_isnan(a) (!((a)==(a)))
+
 #endif