hi.
before commit 4618045bee4a6d3efcb489c319649d8dd9aaa738 ([0])
select array_sort(array(select '1 4'::int2vector union all select '1
2'::int2vector));
array_sort
--------------------------
[1:2][0:1]={{1,2},{1,4}}
(1 row)
after
select array_sort(array(select '1 4'::int2vector union all select '1
2'::int2vector));
array_sort
---------------
{"1 2","1 4"}
(1 row)
now look closer, the second is the expected result...
I didn't dig deeper why commit 4618045bee made this patch result correct,
but I guess it would be best to include such a test case,
so I've attached a patch.
[0] https://git.postgresql.org/cgit/postgresql.git/commit/?id=4618045bee4a6d3efcb489c319649d8dd9aaa738