Index: src/AST/Node.hpp
===================================================================
--- src/AST/Node.hpp	(revision c9f6983f4e20819aa6b06e54ea73762b9db70395)
+++ src/AST/Node.hpp	(revision 9bb9545bb0d45a17e50b0097e22ec114aa9d62c5)
@@ -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() {