diff -U3 /tmp/cirrus-ci-build/contrib/pg_visibility/expected/pg_visibility.out /tmp/cirrus-ci-build/build/testrun/pg_visibility/regress/results/pg_visibility.out
--- /tmp/cirrus-ci-build/contrib/pg_visibility/expected/pg_visibility.out	2024-03-27 22:35:12.787946000 +0000
+++ /tmp/cirrus-ci-build/build/testrun/pg_visibility/regress/results/pg_visibility.out	2024-03-27 22:53:24.691835000 +0000
@@ -8,6 +8,7 @@
 SELECT 'droppedtest'::regclass::oid AS oid \gset
 SAVEPOINT q; DROP TABLE droppedtest; RELEASE q;
 SAVEPOINT q; SELECT * FROM pg_visibility_map(:oid); ROLLBACK TO q;
+WARNING:  01000
 ERROR:  XX000
 -- ERROR:  could not open relation with OID 16xxx
 SAVEPOINT q; SELECT 1; ROLLBACK TO q;
@@ -30,6 +31,7 @@
 (1 row)
 
 SELECT * FROM pg_visibility_map(:oid);
+WARNING:  01000
 ERROR:  XX000
 -- ERROR:  could not open relation with OID 16xxx
 ROLLBACK;
@@ -130,14 +132,17 @@
 create table regular_table (a int, b text);
 alter table regular_table alter column b set storage external;
 insert into regular_table values (1, repeat('one', 1000)), (2, repeat('two', 1000));
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
 vacuum (disable_page_skipping) regular_table;
 select count(*) > 0 from pg_visibility('regular_table');
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
  ?column? 
 ----------
  t
 (1 row)
 
 select count(*) > 0 from pg_visibility((select reltoastrelid from pg_class where relname = 'regular_table'));
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
  ?column? 
 ----------
  t
@@ -145,12 +150,14 @@
 
 truncate regular_table;
 select count(*) > 0 from pg_visibility('regular_table');
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
  ?column? 
 ----------
  f
 (1 row)
 
 select count(*) > 0 from pg_visibility((select reltoastrelid from pg_class where relname = 'regular_table'));
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
  ?column? 
 ----------
  f
@@ -159,14 +166,17 @@
 create materialized view matview_visibility_test as select * from regular_table;
 vacuum (disable_page_skipping) matview_visibility_test;
 select count(*) > 0 from pg_visibility('matview_visibility_test');
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
  ?column? 
 ----------
  f
 (1 row)
 
 insert into regular_table values (1), (2);
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
 refresh materialized view matview_visibility_test;
 select count(*) > 0 from pg_visibility('matview_visibility_test');
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
  ?column? 
 ----------
  t
@@ -176,24 +186,28 @@
 insert into test_partition values (1);
 vacuum (disable_page_skipping) test_partition;
 select count(*) > 0 from pg_visibility('test_partition', 0);
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
  ?column? 
 ----------
  t
 (1 row)
 
 select count(*) > 0 from pg_visibility_map('test_partition');
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
  ?column? 
 ----------
  t
 (1 row)
 
 select count(*) > 0 from pg_visibility_map_summary('test_partition');
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
  ?column? 
 ----------
  t
 (1 row)
 
 select * from pg_check_frozen('test_partition'); -- hopefully none
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
  t_ctid 
 --------
 (0 rows)
@@ -213,6 +227,7 @@
 copy copyfreeze from stdin freeze;
 commit;
 select * from pg_visibility_map('copyfreeze');
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
  blkno | all_visible | all_frozen 
 -------+-------------+------------
      0 | t           | t
@@ -220,6 +235,7 @@
 (2 rows)
 
 select * from pg_check_frozen('copyfreeze');
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
  t_ctid 
 --------
 (0 rows)
@@ -234,6 +250,7 @@
 copy copyfreeze from stdin freeze;
 commit;
 select * from pg_visibility_map('copyfreeze');
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
  blkno | all_visible | all_frozen 
 -------+-------------+------------
      0 | f           | f
@@ -242,6 +259,7 @@
 (3 rows)
 
 select * from pg_check_frozen('copyfreeze');
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
  t_ctid 
 --------
 (0 rows)
@@ -254,6 +272,7 @@
 copy copyfreeze from stdin freeze;
 commit;
 select * from pg_visibility_map('copyfreeze');
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
  blkno | all_visible | all_frozen 
 -------+-------------+------------
      0 | t           | t
@@ -262,6 +281,7 @@
 (3 rows)
 
 select * from pg_check_frozen('copyfreeze');
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
  t_ctid 
 --------
 (0 rows)