diff -U3 /tmp/cirrus-ci-build/contrib/tsm_system_time/expected/tsm_system_time.out /tmp/cirrus-ci-build/build/testrun/tsm_system_time/regress/results/tsm_system_time.out
--- /tmp/cirrus-ci-build/contrib/tsm_system_time/expected/tsm_system_time.out	2024-03-19 15:41:20.194690000 +0000
+++ /tmp/cirrus-ci-build/build/testrun/tsm_system_time/regress/results/tsm_system_time.out	2024-03-19 15:59:40.833309000 +0000
@@ -2,6 +2,7 @@
 CREATE TABLE test_tablesample (id int, name text);
 INSERT INTO test_tablesample SELECT i, repeat(i::text, 1000)
   FROM generate_series(0, 30) s(i);
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
 ANALYZE test_tablesample;
 -- It's a bit tricky to test SYSTEM_TIME in a platform-independent way.
 -- We can test the zero-time corner case ...
@@ -40,6 +41,7 @@
   (VALUES (0),(100000)) v(time),
   LATERAL (SELECT COUNT(*) FROM test_tablesample
            TABLESAMPLE system_time (100000)) ss;
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
                                QUERY PLAN                               
 ------------------------------------------------------------------------
  Nested Loop
@@ -54,6 +56,7 @@
   (VALUES (0),(100000)) v(time),
   LATERAL (SELECT COUNT(*) FROM test_tablesample
            TABLESAMPLE system_time (100000)) ss;
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
   time  | count 
 --------+-------
       0 |    31
@@ -65,6 +68,7 @@
   (VALUES (0),(100000)) v(time),
   LATERAL (SELECT COUNT(*) FROM test_tablesample
            TABLESAMPLE system_time (time)) ss;
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
                            QUERY PLAN                           
 ----------------------------------------------------------------
  Nested Loop
@@ -79,6 +83,7 @@
   (VALUES (0),(100000)) v(time),
   LATERAL (SELECT COUNT(*) FROM test_tablesample
            TABLESAMPLE system_time (time)) ss;
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
   time  | count 
 --------+-------
       0 |     0