diff -U3 /Users/admin/pgsql/src/test/regress/expected/equivclass.out /Users/admin/pgsql/build/testrun/pg_upgrade/002_pg_upgrade/data/results/equivclass.out
--- /Users/admin/pgsql/src/test/regress/expected/equivclass.out	2024-08-30 01:06:13
+++ /Users/admin/pgsql/build/testrun/pg_upgrade/002_pg_upgrade/data/results/equivclass.out	2024-08-30 01:08:46
@@ -483,13 +483,5 @@
 set enable_mergejoin to off;
 explain (costs off)
 select * from tbl_nocom t1 full join tbl_nocom t2 on t2.a = t1.b;
-              QUERY PLAN              
---------------------------------------
- Hash Full Join
-   Hash Cond: (t2.a = t1.b)
-   ->  Seq Scan on tbl_nocom t2
-   ->  Hash
-         ->  Seq Scan on tbl_nocom t1
-(5 rows)
-
+ERROR:  could not find hash function for hash operator 31038
 abort;