Follow up of a290f25:

9EOR9 · 9EOR9 · commit 8198419446f0 · 2025-09-01T11:26:48.000+02:00
Also check validity of python objects in traverse() function,
since they might be closed/deleted before.
diff --git a/mariadb/mariadb_cursor.c b/mariadb/mariadb_cursor.c
@@ -344,8 +344,10 @@ static int MrdbCursor_traverse(
 
 static int MrdbCursor_tpclear(MrdbCursor *self)
 {
-    Py_CLEAR(self->connection);
-    Py_CLEAR(self->data);
+    if (self->connection)
+        Py_CLEAR(self->connection);
+    if (self->data)
+        Py_CLEAR(self->data);
     return 0;
 }
 

Original file line number	Diff line number	Diff line change
`@@ -344,8 +344,10 @@ static int MrdbCursor_traverse(`
`344`	`344`
`345`	`345`	`static int MrdbCursor_tpclear(MrdbCursor *self)`
`346`	`346`	`{`
`347`		`- Py_CLEAR(self->connection);`
`348`		`- Py_CLEAR(self->data);`
	`347`	`+ if (self->connection)`
	`348`	`+ Py_CLEAR(self->connection);`
	`349`	`+ if (self->data)`
	`350`	`+ Py_CLEAR(self->data);`
`349`	`351`	`return 0;`
`350`	`352`	`}`
`351`	`353`