diff -U3 /tmp/cirrus-ci-build/contrib/pg_walinspect/expected/pg_walinspect.out /tmp/cirrus-ci-build/build/testrun/pg_walinspect/regress/results/pg_walinspect.out
--- /tmp/cirrus-ci-build/contrib/pg_walinspect/expected/pg_walinspect.out	2024-03-26 23:35:26.174554000 +0000
+++ /tmp/cirrus-ci-build/build/testrun/pg_walinspect/regress/results/pg_walinspect.out	2024-03-26 23:53:41.335703000 +0000
@@ -3,6 +3,7 @@
 \set VERBOSITY terse
 -- Make sure checkpoints don't interfere with the test.
 SELECT 'init' FROM pg_create_physical_replication_slot('regress_pg_walinspect_slot', true, false);
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
  ?column? 
 ----------
  init
@@ -12,45 +13,58 @@
 -- Save some LSNs for comparisons.
 SELECT pg_current_wal_lsn() AS wal_lsn1 \gset
 INSERT INTO sample_tbl SELECT * FROM generate_series(1, 2);
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
 SELECT pg_current_wal_lsn() AS wal_lsn2 \gset
 INSERT INTO sample_tbl SELECT * FROM generate_series(3, 4);
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
 -- ===================================================================
 -- Tests for input validation
 -- ===================================================================
 -- Invalid input LSN.
 SELECT * FROM pg_get_wal_record_info('0/0');
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
 ERROR:  could not read WAL at LSN 0/0
 -- Invalid start LSN.
 SELECT * FROM pg_get_wal_records_info('0/0', :'wal_lsn1');
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
 ERROR:  could not read WAL at LSN 0/0
 SELECT * FROM pg_get_wal_stats('0/0', :'wal_lsn1');
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
 ERROR:  could not read WAL at LSN 0/0
 SELECT * FROM pg_get_wal_block_info('0/0', :'wal_lsn1');
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
 ERROR:  could not read WAL at LSN 0/0
 -- Start LSN > End LSN.
 SELECT * FROM pg_get_wal_records_info(:'wal_lsn2', :'wal_lsn1');
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
 ERROR:  WAL start LSN must be less than end LSN
 SELECT * FROM pg_get_wal_stats(:'wal_lsn2', :'wal_lsn1');
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
 ERROR:  WAL start LSN must be less than end LSN
 SELECT * FROM pg_get_wal_block_info(:'wal_lsn2', :'wal_lsn1');
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
 ERROR:  WAL start LSN must be less than end LSN
 -- LSNs with the highest value possible.
 SELECT * FROM pg_get_wal_record_info('FFFFFFFF/FFFFFFFF');
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
 ERROR:  WAL input LSN must be less than current LSN
 -- Success with end LSNs.
 SELECT COUNT(*) >= 1 AS ok FROM pg_get_wal_records_info(:'wal_lsn1', 'FFFFFFFF/FFFFFFFF');
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
  ok 
 ----
  t
 (1 row)
 
 SELECT COUNT(*) >= 1 AS ok FROM pg_get_wal_stats(:'wal_lsn1', 'FFFFFFFF/FFFFFFFF');
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
  ok 
 ----
  t
 (1 row)
 
 SELECT COUNT(*) >= 1 AS ok FROM pg_get_wal_block_info(:'wal_lsn1', 'FFFFFFFF/FFFFFFFF');
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
  ok 
 ----
  t
@@ -58,33 +72,40 @@
 
 -- Failures with start LSNs.
 SELECT * FROM pg_get_wal_records_info('FFFFFFFF/FFFFFFFE', 'FFFFFFFF/FFFFFFFF');
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
 ERROR:  WAL start LSN must be less than current LSN
 SELECT * FROM pg_get_wal_stats('FFFFFFFF/FFFFFFFE', 'FFFFFFFF/FFFFFFFF');
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
 ERROR:  WAL start LSN must be less than current LSN
 SELECT * FROM pg_get_wal_block_info('FFFFFFFF/FFFFFFFE', 'FFFFFFFF/FFFFFFFF');
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
 ERROR:  WAL start LSN must be less than current LSN
 -- ===================================================================
 -- Tests for all function executions
 -- ===================================================================
 SELECT COUNT(*) >= 1 AS ok FROM pg_get_wal_record_info(:'wal_lsn1');
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
  ok 
 ----
  t
 (1 row)
 
 SELECT COUNT(*) >= 1 AS ok FROM pg_get_wal_records_info(:'wal_lsn1', :'wal_lsn2');
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
  ok 
 ----
  t
 (1 row)
 
 SELECT COUNT(*) >= 1 AS ok FROM pg_get_wal_stats(:'wal_lsn1', :'wal_lsn2');
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
  ok 
 ----
  t
 (1 row)
 
 SELECT COUNT(*) >= 1 AS ok FROM pg_get_wal_block_info(:'wal_lsn1', :'wal_lsn2');
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
  ok 
 ----
  t
@@ -96,6 +117,7 @@
 SELECT oid AS sample_tbl_oid FROM pg_class WHERE relname = 'sample_tbl' \gset
 SELECT COUNT(*) >= 1 AS ok FROM pg_get_wal_records_info(:'wal_lsn1', :'wal_lsn2')
 			WHERE block_ref LIKE concat('%', :'sample_tbl_oid', '%') AND resource_manager = 'Heap';
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
  ok 
 ----
  t
@@ -107,6 +129,7 @@
 -- ===================================================================
 SELECT COUNT(*) >= 1 AS ok FROM pg_get_wal_records_info(:'wal_lsn1', :'wal_lsn2')
 			WHERE resource_manager = 'Heap' AND record_type = 'INSERT';
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
  ok 
 ----
  t
@@ -122,6 +145,7 @@
 -- Check if we get block data from WAL record.
 SELECT COUNT(*) >= 1 AS ok FROM pg_get_wal_block_info(:'wal_lsn3', :'wal_lsn4')
   WHERE relfilenode = :'sample_tbl_oid' AND block_data IS NOT NULL;
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
  ok 
 ----
  t
@@ -133,8 +157,10 @@
 -- Verify that an XLOG_CHECKPOINT_REDO record begins at precisely the redo LSN
 -- of the checkpoint we just performed.
 SELECT redo_lsn FROM pg_control_checkpoint() \gset
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
 SELECT start_lsn = :'redo_lsn'::pg_lsn AS same_lsn, resource_manager,
     record_type FROM pg_get_wal_record_info(:'redo_lsn');
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
  same_lsn | resource_manager |   record_type   
 ----------+------------------+-----------------
  t        | XLOG             | CHECKPOINT_REDO
@@ -146,6 +172,7 @@
 -- Check if we get FPI from WAL record.
 SELECT COUNT(*) >= 1 AS ok FROM pg_get_wal_block_info(:'wal_lsn5', :'wal_lsn6')
   WHERE relfilenode = :'sample_tbl_oid' AND block_fpi_data IS NOT NULL;
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
  ok 
 ----
  t
diff -U3 /tmp/cirrus-ci-build/contrib/pg_walinspect/expected/oldextversions.out /tmp/cirrus-ci-build/build/testrun/pg_walinspect/regress/results/oldextversions.out
--- /tmp/cirrus-ci-build/contrib/pg_walinspect/expected/oldextversions.out	2024-03-26 23:35:26.174435000 +0000
+++ /tmp/cirrus-ci-build/build/testrun/pg_walinspect/regress/results/oldextversions.out	2024-03-26 23:53:41.366191000 +0000
@@ -20,6 +20,7 @@
 
 -- Make sure checkpoints don't interfere with the test.
 SELECT 'init' FROM pg_create_physical_replication_slot('regress_pg_walinspect_slot', true, false);
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
  ?column? 
 ----------
  init
@@ -28,14 +29,17 @@
 CREATE TABLE sample_tbl(col1 int, col2 int);
 SELECT pg_current_wal_lsn() AS wal_lsn1 \gset
 INSERT INTO sample_tbl SELECT * FROM generate_series(1, 2);
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
 -- Tests for the past functions.
 SELECT COUNT(*) >= 1 AS ok FROM pg_get_wal_records_info_till_end_of_wal(:'wal_lsn1');
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
  ok 
 ----
  t
 (1 row)
 
 SELECT COUNT(*) >= 1 AS ok FROM pg_get_wal_stats_till_end_of_wal(:'wal_lsn1');
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
  ok 
 ----
  t
@@ -43,8 +47,10 @@
 
 -- Failures with start LSNs.
 SELECT * FROM pg_get_wal_records_info_till_end_of_wal('FFFFFFFF/FFFFFFFF');
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
 ERROR:  WAL start LSN must be less than current LSN
 SELECT * FROM pg_get_wal_stats_till_end_of_wal('FFFFFFFF/FFFFFFFF');
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
 ERROR:  WAL start LSN must be less than current LSN
 -- Move to new version 1.1.
 ALTER EXTENSION pg_walinspect UPDATE TO '1.1';