BUG #17176: Error raised on valid query

The following bug has been logged on the website:

Bug reference: 17176
Logged by: Peter Davie
Email address: peter(dot)davie(at)convergentsolutions(dot)com(dot)au
PostgreSQL version: 13.4
Operating system: Windows 10 64-bit
Description:

Hibernate is generating the following query:
select distinct date_part('year', internalme0_.when_occurred) as col_0_0_,
date_part('month', internalme0_.when_occurred) as col_1_0_, date_part('day',
internalme0_.when_occurred) as col_2_0_, date_part('hour',
internalme0_.when_occurred) as col_3_0_, date_part('minute',
internalme0_.when_occurred) as col_4_0_
from InternalMessages internalme0_
group by date_part('year', internalme0_.when_occurred) , date_part('month',
internalme0_.when_occurred) , date_part('day', internalme0_.when_occurred) ,
date_part('hour', internalme0_.when_occurred) , date_part('minute',
internalme0_.when_occurred) , internalme0_.when_occurred
order by date_part($1, internalme0_.when_occurred) asc, date_part($2,
internalme0_.when_occurred) asc, date_part($3, internalme0_.when_occurred)
asc, date_part($4, internalme0_.when_occurred) asc, date_part($5,
internalme0_.when_occurred) asc

The placeholders contain the values 'year', 'month', 'day', 'hour' and
'minute'.

The following error is generated when the query is executed:
ERROR: for SELECT DISTINCT, ORDER BY expressions must appear in select list
at character 635

The Order By and Group By clauses are semantically equivalent.

I am in the process of raising a bug with the Hibernate team to correct the
generation of the query, however this query should be accepted.