--- a/src/array_list.c	Mon Dec 22 16:21:04 2025 +0100
+++ b/src/array_list.c	Mon Dec 22 16:36:06 2025 +0100
@@ -115,8 +115,8 @@
     dst += index * elem_size;
 
     // do we need to move some elements?
-    if (index < array->size) {
-        size_t elems_to_move = array->size - index;
+    size_t elems_to_move = array->size - index;
+    if (elems_to_move > 0) {
         char *target = dst + n * elem_size;
         memmove(target, dst, elems_to_move * elem_size);
     }