fix index update

eendebakpt · eendebakpt · commit dea1835aa472 · 2025-03-13T22:00:35.000+01:00
diff --git a/Modules/itertoolsmodule.c b/Modules/itertoolsmodule.c
@@ -1224,8 +1224,9 @@ cycle_next(PyObject *op)
     item = PyList_GET_ITEM(lz->saved, index);
     index++;
     if (index >= PyList_GET_SIZE(lz->saved)) {
-        FT_ATOMIC_STORE_SSIZE_RELAXED(lz->index, 0);
+        index = 0;
     }
+    FT_ATOMIC_STORE_SSIZE_RELAXED(lz->index, index);
     return Py_NewRef(item);
 }
 

Original file line number	Diff line number	Diff line change
`@@ -1224,8 +1224,9 @@ cycle_next(PyObject *op)`
`1224`	`1224`	`item = PyList_GET_ITEM(lz->saved, index);`
`1225`	`1225`	`index++;`
`1226`	`1226`	`if (index >= PyList_GET_SIZE(lz->saved)) {`
`1227`		`- FT_ATOMIC_STORE_SSIZE_RELAXED(lz->index, 0);`
	`1227`	`+ index = 0;`
`1228`	`1228`	`}`
	`1229`	`+ FT_ATOMIC_STORE_SSIZE_RELAXED(lz->index, index);`
`1229`	`1230`	`return Py_NewRef(item);`
`1230`	`1231`	`}`
`1231`	`1232`