updated tests

fixed small error in state with new system
all tests passing GCC 4.9 std=c++11

sol/state.hpp

@@ -154,7 +154,7 @@ public:
     template<typename Class, typename... CTor, typename... Args>
     state& new_userdata(const std::string& name, Args&&... args) {
         constructors<types<CTor...>> ctor{};
-        return new_userdata(name, ctor, std::forward<Args>(args)...);
+        return new_userdata<Class>(name, ctor, std::forward<Args>(args)...);
     }
 
     template<typename Class, typename... CArgs, typename... Args>

sol/userdata_traits.hpp

@@ -40,7 +40,7 @@ template<typename T>
 const std::string userdata_traits<T>::metatable = std::string("sol.").append(detail::demangle(typeid(T)));
 
 template<typename T>
-const std::string userdata_traits<T>::metatable = std::string("sol.").append(detail::demangle(typeid(T))).append(".\xE2\x99\xBB");
+const std::string userdata_traits<T>::gctable = std::string("sol.").append(detail::demangle(typeid(T))).append(".\xE2\x99\xBB");
 
 }
 

tests.cpp

@@ -703,3 +703,37 @@ TEST_CASE("userdata/issue-number-thirty-five", "using value types created from l
     REQUIRE_NOTHROW(lua.script("v = Vec.new(1, 2, 3)\n"
                "print(v:normalized():length())" ));
 }
+
+TEST_CASE("userdata/lua-stored-userdata", "ensure userdata values can be stored without keeping userdata object alive") {
+    struct Vec {
+      float x, y, z;
+      Vec(float x, float y, float z) : x{x}, y{y}, z{z} {}
+      float length() {
+        return sqrtf(x*x + y*y + z*z);
+      }
+      Vec normalized() {
+        float invS = 1 / length();
+        return {x * invS, y * invS, z * invS};
+      }
+    };
+
+    sol::state lua;
+	lua.open_libraries(sol::lib::base);
+
+    {
+        sol::constructors<sol::types<float, float, float>> ctor;
+        sol::userdata<Vec> udata("Vec", ctor,
+          "normalized", &Vec::normalized,
+          "length",     &Vec::length);
+
+        lua.set_userdata(udata);
+        // userdata dies, but still usable in lua!
+    }
+
+	lua.script("collectgarbage()\n"
+                "v = Vec.new(1, 2, 3)\n"
+                "print(v:length())");
+
+	lua.script("v = Vec.new(1, 2, 3)\n"
+                "print(v:normalized():length())" );
+}