Entities with names starting with q_obj_ are implicit object types.
Therefore, QAPISchema._make_implicit_object_type()'s .lookup_entity()
can only return a QAPISchemaObjectType.  Assert that.

Signed-off-by: Markus Armbruster <arm...@redhat.com>
---
 scripts/qapi/schema.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/scripts/qapi/schema.py b/scripts/qapi/schema.py
index e52930a48a..a6180f93c6 100644
--- a/scripts/qapi/schema.py
+++ b/scripts/qapi/schema.py
@@ -1297,8 +1297,9 @@ def _make_implicit_object_type(
             return None
         # See also QAPISchemaObjectTypeMember.describe()
         name = 'q_obj_%s-%s' % (name, role)
-        typ = self.lookup_entity(name, QAPISchemaObjectType)
+        typ = self.lookup_entity(name)
         if typ:
+            assert(isinstance(typ, QAPISchemaObjectType))
             # The implicit object type has multiple users.  This can
             # only be a duplicate definition, which will be flagged
             # later.
-- 
2.44.0


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