Fix PyStackRef_IsValid accordingly

sergey-miryanov · sergey-miryanov · commit 58b45641b214 · 2025-09-28T12:25:13.000+05:00
diff --git a/Include/internal/pycore_stackref.h b/Include/internal/pycore_stackref.h
@@ -300,7 +300,7 @@ static inline bool
 PyStackRef_IsValid(_PyStackRef ref)
 {
     /* Invalid values are ERROR and NULL */
-    return ref.bits >= Py_INT_TAG;
+    return (ref.bits & Py_TAG_BITS) >= Py_INT_TAG;
 }
 
 static inline bool

Original file line number	Diff line number	Diff line change
`@@ -300,7 +300,7 @@ static inline bool`
`300`	`300`	`PyStackRef_IsValid(_PyStackRef ref)`
`301`	`301`	`{`
`302`	`302`	`/* Invalid values are ERROR and NULL */`
`303`		`- return ref.bits >= Py_INT_TAG;`
	`303`	`+ return (ref.bits & Py_TAG_BITS) >= Py_INT_TAG;`
`304`	`304`	`}`
`305`	`305`
`306`	`306`	`static inline bool`