Fixed memory() and RET usage

src/evaluators/PythonEvaluator.py

@@ -85,6 +85,9 @@ class PythonEvaluator(OneReturnValueEvaluator):
                 not_for_me = context.sheerka.new(BuiltinConcepts.NOT_FOR_ME, body=node)
                 return sheerka.ret(self.name, False, not_for_me, parents=[return_value])
 
+        # If we evaluate a Concept metadata which is NOT the body ex (pre, post, where...)
+        # We need to disable the function that may alter the state
+        # It's a poor way to have source code security check
         attr_under_eval = context.get_parents(lambda ec: ec.action == BuiltinConcepts.EVALUATING_ATTRIBUTE)
         if attr_under_eval:
             attr_under_eval = attr_under_eval[0]
@@ -256,7 +259,7 @@ class PythonEvaluator(OneReturnValueEvaluator):
             else:
                 context.log(f"Evaluating '{concept}'", self.name)
                 evaluated = context.sheerka.evaluate_concept(context, concept, eval_body=True)
-                if evaluated.key != concept.key:
+                if not context.sheerka.is_success(evaluated) and evaluated.key != concept.key:
                     context.log(f"Error while evaluating '{name}'. Skipping.", self.name)
                     continue
                 concept = evaluated