diff -r c4041b07165e -r b5dd654deb3b src/array_list.c
--- a/src/array_list.c	Mon Mar 20 18:05:12 2023 +0100
+++ b/src/array_list.c	Mon Mar 20 19:09:08 2023 +0100
@@ -310,15 +310,14 @@
     switch (list->content_destructor_type) {
         case CX_DESTRUCTOR_SIMPLE: {
             for (size_t i = 0; i < list->size; i++) {
-                list->simple_destructor(ptr);
+                cx_list_invoke_simple_destructor(list, ptr);
                 ptr += list->itemsize;
             }
             break;
         }
         case CX_DESTRUCTOR_ADVANCED: {
             for (size_t i = 0; i < list->size; i++) {
-                list->advanced_destructor.func(list->advanced_destructor.data,
-                                               ptr);
+                cx_list_invoke_advanced_destructor(list, ptr);
                 ptr += list->itemsize;
             }
             break;
@@ -326,6 +325,9 @@
         case CX_DESTRUCTOR_NONE:
             break; // nothing
     }
+
+    memset(arl->data, 0, list->size * list->itemsize);
+    list->size = 0;
 }
 
 static int cx_arl_swap(