Enhanced ExecutionContext to keep track of the execution flow

core/builtin_concepts.py

@@ -186,7 +186,12 @@ class ReturnValueConcept(Concept):
                self.message == other.message
 
     def __hash__(self):
-        return hash((self.who, self.status, self.value))
+        if hasattr(self.value, "__iter__") and not isinstance(self.value, str):
+            value_hash = hash(tuple(self.value))
+        else:
+            value_hash = hash(self.value)
+
+        return hash((self.who, self.status, value_hash))
 
 
 class UnknownPropertyConcept(Concept):
@@ -233,6 +238,9 @@ class ParserResultConcept(Concept):
                self.body == other.body and \
                self.try_parsed == other.try_parsed
 
+    def __hash__(self):
+        return hash(self.metadata.name)
+
     @property
     def value(self):
         return self.body