diff -U3 /tmp/cirrus-ci-build/contrib/cube/expected/cube.out /tmp/cirrus-ci-build/build/testrun/cube/regress/results/cube.out
--- /tmp/cirrus-ci-build/contrib/cube/expected/cube.out	2024-03-19 00:05:09.489407000 +0000
+++ /tmp/cirrus-ci-build/build/testrun/cube/regress/results/cube.out	2024-03-19 00:22:30.985592000 +0000
@@ -6,6 +6,7 @@
 SELECT amname, opcname
 FROM pg_opclass opc LEFT JOIN pg_am am ON am.oid = opcmethod
 WHERE opc.oid >= 16384 AND NOT amvalidate(opc.oid);
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
  amname | opcname 
 --------+---------
 (0 rows)
@@ -345,6 +346,7 @@
 (1 row)
 
 SELECT * FROM pg_input_error_info('-1e-700', 'cube');
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
                        message                       | detail | hint | sql_error_code 
 -----------------------------------------------------+--------+------+----------------
  "-1e-700" is out of range for type double precision |        |      | 22003
@@ -445,6 +447,7 @@
 ERROR:  Index out of bounds
 -- test for limits: this should pass
 SELECT cube_subset(cube('(6,7,8),(6,7,8)'), array(SELECT 1 as a FROM generate_series(1,100)));
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
                                                                                                                                                  cube_subset                                                                                                                                                  
 --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
  (6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6)
@@ -452,6 +455,7 @@
 
 -- and this should fail
 SELECT cube_subset(cube('(6,7,8),(6,7,8)'), array(SELECT 1 as a FROM generate_series(1,101)));
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
 ERROR:  array is too long
 DETAIL:  A cube cannot have more than 100 dimensions.
 --
@@ -539,20 +543,24 @@
 DETAIL:  A cube cannot have more than 100 dimensions.
 -- from an array
 select cube(array(SELECT 0 as a FROM generate_series(1,101)));
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
 ERROR:  array is too long
 DETAIL:  A cube cannot have more than 100 dimensions.
 select cube(array(SELECT 0 as a FROM generate_series(1,101)),array(SELECT 0 as a FROM generate_series(1,101)));
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
 ERROR:  can't extend cube
 DETAIL:  A cube cannot have more than 100 dimensions.
 -- extend cube beyond limit
 -- this should work
 select cube(array(SELECT 0 as a FROM generate_series(1,100)));
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
                                                                                                                                                      cube                                                                                                                                                     
 --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
  (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0)
 (1 row)
 
 select cube(array(SELECT 0 as a FROM generate_series(1,100)),array(SELECT 0 as a FROM generate_series(1,100)));
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
                                                                                                                                                      cube                                                                                                                                                     
 --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
  (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0)
@@ -560,9 +568,11 @@
 
 -- this should fail
 select cube(cube(array(SELECT 0 as a FROM generate_series(1,100))), 0);
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
 ERROR:  can't extend cube
 DETAIL:  A cube cannot have more than 100 dimensions.
 select cube(cube(array(SELECT 0 as a FROM generate_series(1,100)),array(SELECT 0 as a FROM generate_series(1,100))), 0, 0);
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
 ERROR:  can't extend cube
 DETAIL:  A cube cannot have more than 100 dimensions.
 --
@@ -1582,6 +1592,7 @@
 RESET enable_bitmapscan;
 -- Test kNN
 INSERT INTO test_cube VALUES ('(1,1)'), ('(100000)'), ('(0, 100000)'); -- Some corner cases
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
 SET enable_seqscan = false;
 -- Test different metrics
 SET extra_float_digits = 0;