QAPISchemaInfo instances are sometimes defined as an Optional
field/argument because built-in definitions don't *have* a source
definition. As a consequence, there are a few places where we need to
assert that it's present because the root entity definition can only
enforce that it is "Optional".

Signed-off-by: John Snow <js...@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <phi...@linaro.org>
---
 scripts/qapi/schema.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/scripts/qapi/schema.py b/scripts/qapi/schema.py
index 43af756ed47..eefa58a798b 100644
--- a/scripts/qapi/schema.py
+++ b/scripts/qapi/schema.py
@@ -758,6 +758,7 @@ def describe(self, info):
             else:
                 assert False
 
+        assert info is not None
         if defined_in != info.defn_name:
             return "%s '%s' of %s '%s'" % (role, self.name, meta, defined_in)
         return "%s '%s'" % (role, self.name)
@@ -848,6 +849,7 @@ def __init__(self, name, info, doc, ifcond, features,
         self.coroutine = coroutine
 
     def check(self, schema):
+        assert self.info is not None
         super().check(schema)
         if self._arg_type_name:
             arg_type = schema.resolve_type(
-- 
2.43.0


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