--- a/src/cx/list.h	Mon Aug 25 21:47:45 2025 +0200
+++ b/src/cx/list.h	Tue Aug 26 21:14:17 2025 +0200
@@ -183,7 +183,6 @@
      * to another list of the same type.
      * If set to @c NULL, comparison won't be optimized.
      */
-    cx_attr_nonnull
     int (*compare)(
             const struct cx_list_s *list,
             const struct cx_list_s *other