verify missing safely

Author: tungol

mypy/stubtest.py

@@ -1095,9 +1095,11 @@ def verify_funcitem(
 
 
 @verify.register(Missing)
-def verify_none(
+def verify_missing(
     stub: Missing, runtime: MaybeMissing[Any], object_path: list[str]
 ) -> Iterator[Error]:
+    if runtime is MISSING:
+        return
     yield Error(object_path, "is not present in stub", stub, runtime)