Index: src/AST/Node.hpp
===================================================================
--- src/AST/Node.hpp	(revision 490fb92ee824a236b6dd44604bfed5090c7acc95)
+++ src/AST/Node.hpp	(revision 390fb02b2df905afef08792dee99f77218c37c0c)
@@ -229,5 +229,6 @@
 	const node_t & operator* () const { _check(); return *node; }
 	explicit operator bool() const { _check(); return node; }
-	operator const node_t * () const { _check(); return node; }
+	operator const node_t * () const & { _check(); return node; }
+	operator const node_t * () && = delete;
 
 	const node_t * release() {