BUG: fix datetime/timedelta hash memory leak

numpy · ngoldbaum · Jul 24, 2025 · Jul 22, 2025 · Jul 24, 2025 · Jul 24, 2025
commit 0d65fa2a1c87bcd82b7a0ab0a522e3027963f9ab
diff --git a/numpy/_core/src/multiarray/scalartypes.c.src b/numpy/_core/src/multiarray/scalartypes.c.src
@@ -3922,7 +3922,9 @@ static npy_hash_t
     dtype = PyArray_DescrFromScalar(obj);
     meta = get_datetime_metadata_from_dtype(dtype);
 
-    return @lname@_hash(meta, val);
+    npy_hash_t res = @lname@_hash(meta, val);
+    Py_DECREF(dtype);
+    return res;
 }
 /**end repeat**/