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-rw-r--r--scripts/qapi/introspect.py5
1 files changed, 5 insertions, 0 deletions
diff --git a/scripts/qapi/introspect.py b/scripts/qapi/introspect.py
index fafec94e02..43ab4be1f7 100644
--- a/scripts/qapi/introspect.py
+++ b/scripts/qapi/introspect.py
@@ -147,6 +147,8 @@ const QLitObject %(c_name)s = %(c_string)s;
         return self._name_map[name]
 
     def _use_type(self, typ):
+        assert self._schema is not None
+
         # Map the various integer types to plain int
         if typ.json_type() == 'int':
             typ = self._schema.lookup_type('int')
@@ -225,6 +227,8 @@ const QLitObject %(c_name)s = %(c_string)s;
     def visit_command(self, name, info, ifcond, features,
                       arg_type, ret_type, gen, success_response, boxed,
                       allow_oob, allow_preconfig, coroutine):
+        assert self._schema is not None
+
         arg_type = arg_type or self._schema.the_empty_object_type
         ret_type = ret_type or self._schema.the_empty_object_type
         obj = {'arg-type': self._use_type(arg_type),
@@ -234,6 +238,7 @@ const QLitObject %(c_name)s = %(c_string)s;
         self._gen_tree(name, 'command', obj, ifcond, features)
 
     def visit_event(self, name, info, ifcond, features, arg_type, boxed):
+        assert self._schema is not None
         arg_type = arg_type or self._schema.the_empty_object_type
         self._gen_tree(name, 'event', {'arg-type': self._use_type(arg_type)},
                        ifcond, features)