1 files changed, 11 insertions, 0 deletions
diff --git a/core/config/engine.cpp b/core/config/engine.cpp
index b0037ffb37..26f8cdf840 100644
--- a/core/config/engine.cpp
+++ b/core/config/engine.cpp
@@ -219,3 +219,14 @@ Engine *Engine::get_singleton() {
 Engine::Engine() {
 	singleton = this;
 }
+
+Engine::Singleton::Singleton(const StringName &p_name, Object *p_ptr) :
+		name(p_name),
+		ptr(p_ptr) {
+#ifdef DEBUG_ENABLED
+	Reference *ref = Object::cast_to<Reference>(p_ptr);
+	if (ref && !ref->is_referenced()) {
+		WARN_PRINT("You must use Ref<> to ensure the lifetime of a Reference object intended to be used as a singleton.");
+	}
+#endif
+}