pythongh-131719: add NULL pointer check to _PyMem_FreeDelayed (pythongh-131720)

tom-pytel · miss-islington · commit cbd4749c5609 · 2025-03-25T14:49:28.000Z
(cherry picked from commit 0a91456) Co-authored-by: Tomasz Pytel <tompytel@gmail.com>
diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2025-03-25-13-58-25.gh-issue-131719.zKv98a.rst b/Misc/NEWS.d/next/Core_and_Builtins/2025-03-25-13-58-25.gh-issue-131719.zKv98a.rst
@@ -0,0 +1 @@
+Fix missing NULL check in ``_PyMem_FreeDelayed`` in :term:`free-threaded <free threading>` build.
diff --git a/Objects/obmalloc.c b/Objects/obmalloc.c
@@ -1160,7 +1160,9 @@ void
 _PyMem_FreeDelayed(void *ptr)
 {
     assert(!((uintptr_t)ptr & 0x01));
-    free_delayed((uintptr_t)ptr);
+    if (ptr != NULL) {
+        free_delayed((uintptr_t)ptr);
+    }
 }
 
 void

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1 @@`
	`1`	+Fix missing NULL check in ``_PyMem_FreeDelayed`` in :term:`free-threaded <free threading>` build.