Fixed some bugs

src/evaluators/AddConceptInSetEvaluator.py

@@ -35,7 +35,8 @@ class AddConceptInSetEvaluator(OneReturnValueEvaluator):
                 True,
                 sheerka.new(BuiltinConcepts.USER_INPUT, body=parser_input, user_name="N/A"))
 
-            with context.push(BuiltinConcepts.PROCESS_INPUT, name_node, desc=f"Recognizing '{name_node}'") as sub_context:
+            with context.push(BuiltinConcepts.PROCESS_INPUT, name_node,
+                              desc=f"Recognizing '{name_node}'") as sub_context:
                 r = sheerka.execute(sub_context, ret_val, ALL_STEPS)
                 one_r = core.builtin_helpers.expect_one(context, r)
                 sub_context.add_values(return_values=one_r)
@@ -55,6 +56,10 @@ class AddConceptInSetEvaluator(OneReturnValueEvaluator):
                 parents=[return_value])
         concept = res.value
 
+        if sheerka.has_id(concept.id) and id(concept) == id(sheerka.get_by_id(concept.id)):
+            # hack because it is not possible to use sheerka.modify_concept() on a cache instance
+            concept = sheerka.new((concept.name, concept.id))
+
         res = _resolve(isa_node.set)
         if not res.status:
             return sheerka.ret(
@@ -75,5 +80,3 @@ class AddConceptInSetEvaluator(OneReturnValueEvaluator):
             res.status,
             res.body,
             parents=[return_value])
-
-