Fix the condition

yoney · yoney · commit 68ecfe52617d · 2025-10-23T13:32:08.000-07:00
diff --git a/Objects/setobject.c b/Objects/setobject.c
@@ -2781,7 +2781,7 @@ PySet_Add(PyObject *anyset, PyObject *key)
         return rv;
     }
 
-    if (PyFrozenSet_Check(anyset) || _PyObject_IsUniquelyReferenced(anyset)) {
+    if (PyFrozenSet_Check(anyset) && _PyObject_IsUniquelyReferenced(anyset)) {
         // We can only change frozensets if they are uniquely referenced. The
         // API limits the usage of `PySet_Add` to "fill in the values of brand
         // new frozensets before they are exposed to other code". In this case,

Original file line number	Diff line number	Diff line change
`@@ -2781,7 +2781,7 @@ PySet_Add(PyObject anyset, PyObject key)`
`2781`	`2781`	`return rv;`
`2782`	`2782`	`}`
`2783`	`2783`
`2784`		`- if (PyFrozenSet_Check(anyset) \|\| _PyObject_IsUniquelyReferenced(anyset)) {`
	`2784`	`+ if (PyFrozenSet_Check(anyset) && _PyObject_IsUniquelyReferenced(anyset)) {`
`2785`	`2785`	`// We can only change frozensets if they are uniquely referenced. The`
`2786`	`2786`	// API limits the usage of `PySet_Add` to "fill in the values of brand
`2787`	`2787`	`// new frozensets before they are exposed to other code". In this case,`