Fix an additional unintentional resolution scope change in RefResolver

Closes: #1085

Author: Julian

jsonschema/tests/test_validators.py

@@ -2333,8 +2333,15 @@ def test_pointer_within_schema_with_different_id(self):
         See #1085.
         """
         schema = validators.Draft7Validator.META_SCHEMA
-        resolver = validators._RefResolver("", schema)
-        validator = validators.Draft7Validator(schema, resolver=resolver)
+        one = validators._RefResolver("", schema)
+        validator = validators.Draft7Validator(schema, resolver=one)
+        self.assertFalse(validator.is_valid({"maxLength": "foo"}))
+
+        another = {
+            "allOf": [{"$ref": validators.Draft7Validator.META_SCHEMA["$id"]}],
+        }
+        two = validators._RefResolver("", another)
+        validator = validators.Draft7Validator(another, resolver=two)
         self.assertFalse(validator.is_valid({"maxLength": "foo"}))
 
 

jsonschema/validators.py

@@ -387,11 +387,14 @@ def descend(
                 )
                 return
 
-            if resolver is None:
-                resolver = self._resolver.in_subresource(
-                    specification.create_resource(schema),
-                )
-            evolved = self.evolve(schema=schema, _resolver=resolver)
+            if self._ref_resolver is not None:
+                evolved = self.evolve(schema=schema)
+            else:
+                if resolver is None:
+                    resolver = self._resolver.in_subresource(
+                        specification.create_resource(schema),
+                    )
+                evolved = self.evolve(schema=schema, _resolver=resolver)
 
             for k, v in applicable_validators(schema):
                 validator = evolved.VALIDATORS.get(k)
@@ -448,7 +451,7 @@ def _validate_reference(self, ref, instance):
                     self._ref_resolver.push_scope(scope)
 
                     try:
-                        return self.descend(instance, resolved)
+                        return list(self.descend(instance, resolved))
                     finally:
                         self._ref_resolver.pop_scope()