bpo-35452: Make PySys_HasWarnOptions() never raising an exception. (GH-11075)

(cherry picked from commit dffccc6b594951fc798973e521da205785823f0f)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>

diff --git a/Python/sysmodule.c b/Python/sysmodule.c
index a0485073817083f5bcda14e1f86200f176dacb0d..efe5b29ef33c8103cfdae0bca9a9c6ffdeb99c1a 100644 (file)
--- a/Python/sysmodule.c
+++ b/Python/sysmodule.c
@@ -1823,7 +1823,8 @@ int
 PySys_HasWarnOptions(void)
 {
     PyObject *warnoptions = _PySys_GetObjectId(&PyId_warnoptions);
-    return (warnoptions != NULL && (PyList_Size(warnoptions) > 0)) ? 1 : 0;
+    return (warnoptions != NULL && PyList_Check(warnoptions)
+            && PyList_GET_SIZE(warnoptions) > 0);
 }
 
 static PyObject *