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-rw-r--r--scripts/qapi/introspect.py8
1 files changed, 4 insertions, 4 deletions
diff --git a/scripts/qapi/introspect.py b/scripts/qapi/introspect.py
index e770c9432b..d0b0fd19ed 100644
--- a/scripts/qapi/introspect.py
+++ b/scripts/qapi/introspect.py
@@ -249,13 +249,13 @@ const QLitObject %(c_name)s = %(c_string)s;
         return self._name(typ.name)
 
     @staticmethod
-    def _gen_features(features: List[QAPISchemaFeature]
+    def _gen_features(features: Sequence[QAPISchemaFeature]
                       ) -> List[Annotated[str]]:
         return [Annotated(f.name, f.ifcond) for f in features]
 
     def _gen_tree(self, name: str, mtype: str, obj: Dict[str, object],
                   ifcond: Sequence[str],
-                  features: Optional[List[QAPISchemaFeature]]) -> None:
+                  features: Sequence[QAPISchemaFeature] = ()) -> None:
         """
         Build and append a SchemaInfo object to self._trees.
 
@@ -302,7 +302,7 @@ const QLitObject %(c_name)s = %(c_string)s;
 
     def visit_builtin_type(self, name: str, info: Optional[QAPISourceInfo],
                            json_type: str) -> None:
-        self._gen_tree(name, 'builtin', {'json-type': json_type}, [], None)
+        self._gen_tree(name, 'builtin', {'json-type': json_type}, [])
 
     def visit_enum_type(self, name: str, info: Optional[QAPISourceInfo],
                         ifcond: Sequence[str],
@@ -320,7 +320,7 @@ const QLitObject %(c_name)s = %(c_string)s;
                          element_type: QAPISchemaType) -> None:
         element = self._use_type(element_type)
         self._gen_tree('[' + element + ']', 'array', {'element-type': element},
-                       ifcond, None)
+                       ifcond)
 
     def visit_object_type_flat(self, name: str, info: Optional[QAPISourceInfo],
                                ifcond: Sequence[str],