1 files changed, 9 insertions, 1 deletions
diff --git a/Modules/_zoneinfo.c b/Modules/_zoneinfo.c
index c8c791b..0dcdb4d 100644
--- a/Modules/_zoneinfo.c
+++ b/Modules/_zoneinfo.c
@@ -2381,7 +2381,12 @@ get_local_timestamp(PyObject *dt, int64_t *local_ts)
 /////
 // Functions for cache handling
 
-/* Constructor for StrongCacheNode */
+/* Constructor for StrongCacheNode
+ *
+ * This function doesn't set MemoryError if PyMem_Malloc fails,
+ * as the cache intentionally doesn't propagate exceptions
+ * and fails silently if error occurs.
+ */
 static StrongCacheNode *
 strong_cache_node_new(PyObject *key, PyObject *zone)
 {
@@ -2572,6 +2577,9 @@ update_strong_cache(zoneinfo_state *state, const PyTypeObject *const type,
     }
 
     StrongCacheNode *new_node = strong_cache_node_new(key, zone);
+    if (new_node == NULL) {
+        return;
+    }
     StrongCacheNode **root = &(state->ZONEINFO_STRONG_CACHE);
     move_strong_cache_node_to_front(state, root, new_node);