[Bug]: Upgradee PostgreSQL 15.3 with TS 2.15 to PostgreSQL 16.3 failed

[pgloader]

What type of bug is this?

Other

What subsystems and features are affected?

Other

What happened?

Upgradee PostgreSQL 15.3 with TS 2.15 to PostgreSQL 16.3 failed on RHEL8

Performing Consistency Checks

Checking cluster versions ok
Checking database user is the install user ok
Checking database connection settings ok
Checking for prepared transactions ok
Checking for system-defined composite types in user tables ok
Checking for reg* data types in user tables fatal

Your installation contains one of the reg* data types in user tables.
These data types reference system OIDs that are not preserved by
pg_upgrade, so this cluster cannot currently be upgraded. You can
drop the problem columns and restart the upgrade.
A list of the problem columns is in the file:
/var/opt/data/pgsql_data/5432/dat.16.3/pg_upgrade_output.d/20240607T154928.743/tables_using_reg.txt
Failure, exiting
Fri Jun 7 15:49:32 EDT 2024 ERROR: Please verify the upgrade pre-check result and resolve any issues before continue.

tables_using_reg.txt
In database: test
_timescaledb_catalog.continuous_aggs_bucket_function.bucket_func

TimescaleDB version affected

2.15.0

PostgreSQL version used

16.3

What operating system did you use?

Red Hat Enterprise Linux release 8.6 (Ootpa)

What installation method did you use?

Source

What platform did you run on?

On prem/Self-hosted

Relevant log output and stack trace

In database: test
  _timescaledb_catalog.continuous_aggs_bucket_function.bucket_func

How can we reproduce the bug?

run pg_upgrade

[fabriziomello]

@pgloader this issue was fixed on 2.15.1. Anyway I strongly recommend you to update to 2.15.2 becuase of a pontential catalog corruption we found and fixed.