diff -U3 /tmp/cirrus-ci-build/src/test/regress/expected/union.out /tmp/cirrus-ci-build/build/testrun/recovery/027_stream_regress/data/results/union.out
--- /tmp/cirrus-ci-build/src/test/regress/expected/union.out	2026-05-04 11:33:35.379872000 +0000
+++ /tmp/cirrus-ci-build/build/testrun/recovery/027_stream_regress/data/results/union.out	2026-05-04 11:37:15.586826000 +0000
@@ -550,9 +550,9 @@
 select x from (values (array[1, 2]), (array[1, 3])) _(x) union select x from (values (array[1, 2]), (array[1, 4])) _(x);
    x   
 -------
+ {1,2}
  {1,4}
  {1,3}
- {1,2}
 (3 rows)
 
 explain (costs off)