diff -U3 /tmp/cirrus-ci-build/src/test/modules/test_copy_callbacks/expected/test_copy_callbacks.out /tmp/cirrus-ci-build/build/testrun/test_copy_callbacks/regress/results/test_copy_callbacks.out
--- /tmp/cirrus-ci-build/src/test/modules/test_copy_callbacks/expected/test_copy_callbacks.out	2024-03-27 22:35:14.246417000 +0000
+++ /tmp/cirrus-ci-build/build/testrun/test_copy_callbacks/regress/results/test_copy_callbacks.out	2024-03-27 22:53:42.359557000 +0000
@@ -1,6 +1,7 @@
 CREATE EXTENSION test_copy_callbacks;
 CREATE TABLE public.test (a INT, b INT, c INT);
 INSERT INTO public.test VALUES (1, 2, 3), (12, 34, 56), (123, 456, 789);
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
 SELECT test_copy_to_callback('public.test'::pg_catalog.regclass);
 NOTICE:  COPY TO callback called with data "1	2	3" and length 5
 NOTICE:  COPY TO callback called with data "12	34	56" and length 8