Add issue to the comment

godlygeek · godlygeek · commit 3a60ca340a00 · 2026-06-11T16:34:11.000-04:00
diff --git a/Objects/obmalloc.c b/Objects/obmalloc.c
@@ -363,7 +363,7 @@ _PyObject_MiRealloc(void *ctx, void *ptr, size_t nbytes)
         _mi_memcpy((char*)newp + offset, (char*)ptr + offset, copy_size - offset);
     }
     else {
-        // memcpy(dst, NULL, 0) is undefined behavior. Guard against it.
+        // memcpy(dst, NULL, 0) is undefined behavior. See gh-151297.
         if mi_likely(ptr) {
             _mi_memcpy(newp, ptr, copy_size);
         }

Original file line number	Diff line number	Diff line change
`@@ -363,7 +363,7 @@ _PyObject_MiRealloc(void ctx, void ptr, size_t nbytes)`
`363`	`363`	`_mi_memcpy((char)newp + offset, (char)ptr + offset, copy_size - offset);`
`364`	`364`	`}`
`365`	`365`	`else {`
`366`		`- // memcpy(dst, NULL, 0) is undefined behavior. Guard against it.`
	`366`	`+ // memcpy(dst, NULL, 0) is undefined behavior. See gh-151297.`
`367`	`367`	`if mi_likely(ptr) {`
`368`	`368`	`_mi_memcpy(newp, ptr, copy_size);`
`369`	`369`	`}`