Regression test collate.icu.utf8 failed on REL_14_STABLE

Hi, hackers

I find when I compile PG 14 with --with-icu, collate.icu.utf8 and foreign_data
regression tests will failed.  However it is OK on REL_15_STABLE and master.
I also test this on REL_13_STABLE, and it also failed.  Here is the regression
diffs.

diff -U3 /home/japin/Codes/postgres/build/../src/test/regress/expected/collate.icu.utf8.out
/home/japin/Codes/postgres/build/src/test/regress/results/collate.icu.utf8.out
--- /home/japin/Codes/postgres/build/../src/test/regress/expected/collate.icu.utf8.out    2023-08-14 17:37:31.960448245
+0800
+++ /home/japin/Codes/postgres/build/src/test/regress/results/collate.icu.utf8.out    2023-08-14 21:30:44.335214886
+0800
@@ -1035,6 +1035,9 @@
           quote_literal(current_setting('lc_ctype')) || ');';
 END
 $$;
+ERROR:  collations with different collate and ctype values are not supported by ICU
+CONTEXT:  SQL statement "CREATE COLLATION test1 (provider = icu, lc_collate = 'C.UTF-8', lc_ctype = 'en_US.UTF-8');"
+PL/pgSQL function inline_code_block line 3 at EXECUTE
 CREATE COLLATION test3 (provider = icu, lc_collate = 'en_US.utf8'); -- fail, need lc_ctype
 ERROR:  parameter "lc_ctype" must be specified
 CREATE COLLATION testx (provider = icu, locale = 'nonsense'); /* never fails with ICU */  DROP COLLATION testx;
@@ -1045,13 +1048,12 @@
  collname 
 ----------
  test0
- test1
  test5
-(3 rows)
+(2 rows)
 
 ALTER COLLATION test1 RENAME TO test11;
+ERROR:  collation "test1" for encoding "UTF8" does not exist
 ALTER COLLATION test0 RENAME TO test11; -- fail
-ERROR:  collation "test11" already exists in schema "collate_tests"
 ALTER COLLATION test1 RENAME TO test22; -- fail
 ERROR:  collation "test1" for encoding "UTF8" does not exist
 ALTER COLLATION test11 OWNER TO regress_test_role;
@@ -1059,18 +1061,19 @@
 ERROR:  role "nonsense" does not exist
 ALTER COLLATION test11 SET SCHEMA test_schema;
 COMMENT ON COLLATION test0 IS 'US English';
+ERROR:  collation "test0" for encoding "UTF8" does not exist
 SELECT collname, nspname, obj_description(pg_collation.oid, 'pg_collation')
     FROM pg_collation JOIN pg_namespace ON (collnamespace = pg_namespace.oid)
     WHERE collname LIKE 'test%'
     ORDER BY 1;
  collname |    nspname    | obj_description 
 ----------+---------------+-----------------
- test0    | collate_tests | US English
  test11   | test_schema   | 
  test5    | collate_tests | 
-(3 rows)
+(2 rows)
 
 DROP COLLATION test0, test_schema.test11, test5;
+ERROR:  collation "test0" for encoding "UTF8" does not exist
 DROP COLLATION test0; -- fail
 ERROR:  collation "test0" for encoding "UTF8" does not exist
 DROP COLLATION IF EXISTS test0;
@@ -1078,10 +1081,17 @@
 SELECT collname FROM pg_collation WHERE collname LIKE 'test%';
  collname 
 ----------
-(0 rows)
+ test11
+ test5
+(2 rows)
 
 DROP SCHEMA test_schema;
+ERROR:  cannot drop schema test_schema because other objects depend on it
+DETAIL:  collation test_schema.test11 depends on schema test_schema
+HINT:  Use DROP ... CASCADE to drop the dependent objects too.
 DROP ROLE regress_test_role;
+ERROR:  role "regress_test_role" cannot be dropped because some objects depend on it
+DETAIL:  owner of collation test_schema.test11
 -- ALTER
 ALTER COLLATION "en-x-icu" REFRESH VERSION;
 NOTICE:  version has not changed
diff -U3 /home/japin/Codes/postgres/build/../src/test/regress/expected/foreign_data.out
/home/japin/Codes/postgres/build/src/test/regress/results/foreign_data.out
--- /home/japin/Codes/postgres/build/../src/test/regress/expected/foreign_data.out    2023-08-14 17:37:31.964448260
+0800
+++ /home/japin/Codes/postgres/build/src/test/regress/results/foreign_data.out    2023-08-14 21:30:55.571170376 +0800
@@ -5,10 +5,13 @@
 -- Suppress NOTICE messages when roles don't exist
 SET client_min_messages TO 'warning';
 DROP ROLE IF EXISTS regress_foreign_data_user, regress_test_role, regress_test_role2, regress_test_role_super,
regress_test_indirect,regress_unprivileged_role;
 
+ERROR:  role "regress_test_role" cannot be dropped because some objects depend on it
+DETAIL:  owner of collation test_schema.test11
 RESET client_min_messages;
 CREATE ROLE regress_foreign_data_user LOGIN SUPERUSER;
 SET SESSION AUTHORIZATION 'regress_foreign_data_user';
 CREATE ROLE regress_test_role;
+ERROR:  role "regress_test_role" already exists
 CREATE ROLE regress_test_role2;
 CREATE ROLE regress_test_role_super SUPERUSER;
 CREATE ROLE regress_test_indirect;

Is it a bug that fixed in REL_15_STABLE? If yes, why not backpatch?


-- 
Regrads,
Japin Li