diff -U3 /tmp/cirrus-ci-build/contrib/xml2/expected/xml2.out /tmp/cirrus-ci-build/build/testrun/xml2/regress/results/xml2.out
--- /tmp/cirrus-ci-build/contrib/xml2/expected/xml2.out	2024-03-21 16:29:25.576147000 +0000
+++ /tmp/cirrus-ci-build/build/testrun/xml2/regress/results/xml2.out	2024-03-21 16:48:08.481253000 +0000
@@ -28,6 +28,7 @@
 </xsl:template>
 </xsl:stylesheet>
 $$::text);
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
                          xslt_process                          
 ---------------------------------------------------------------
  <?xml version="1.0"?>                                        +
@@ -61,12 +62,14 @@
 INSERT INTO xpath_test VALUES (1, '<doc><int>1</int></doc>');
 SELECT * FROM xpath_table('id', 't', 'xpath_test', '/doc/int', 'true')
 as t(id int4);
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
  id 
 ----
 (0 rows)
 
 SELECT * FROM xpath_table('id', 't', 'xpath_test', '/doc/int', 'true')
 as t(id int4, doc int4);
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
  id | doc 
 ----+-----
   1 |   1
@@ -77,12 +80,14 @@
 INSERT INTO xpath_test VALUES (1, '<doc><int>1</int></doc>');
 SELECT * FROM xpath_table('id', 't', 'xpath_test', '/doc/int', 'true')
 as t(id int4);
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
  id 
 ----
 (0 rows)
 
 SELECT * FROM xpath_table('id', 't', 'xpath_test', '/doc/int', 'true')
 as t(id int4, doc int4);
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
  id | doc 
 ----+-----
   1 |   1
@@ -98,6 +103,7 @@
             '/article/author|/article/pages|/article/title',
             'date_entered > ''2003-01-01'' ')
 AS t(article_id integer, author text, page_count integer, title text);
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
  article_id | author | page_count | title 
 ------------+--------+------------+-------
           2 | test   |         37 |