test: done for refactor, ready to merge

src/lae_arraylist.c

@@ -508,6 +508,7 @@ ArrayListErr arraylist_slice_unsafe(
     new_slice->end = start + len;
     new_slice->current = start;
     new_slice->is_safe = false;
+    new_slice->allocator = allocator;
 
     *slice = new_slice;
     return ARRLIST_OK;