Re: Bug Report: PostgreSQL 16 crashes on ALTER USER CURRENT_USER WITH PASSWORD

Hi Gilles,
So it seems this bug is related to the credcheck extension, updating
credcheck to the latest version 4.3.0 did not help,
when removing credcheck extension from the shared_preload_libraries
parameter the bug disappears.

I will open a bug request on github for credcheck.

Thank you all very much for your help.

On Thu, Jan 8, 2026 at 5:45 AM Gilles Darold <gilles(at)darold(dot)net> wrote:

> Le 06/01/2026 à 14:58, Andrii a écrit :
>
> Summary
>
> PostgreSQL server crashes with a segmentation fault when executing ALTER
> USER CURRENT_USER WITH PASSWORD in PostgreSQL 16.10 and 16.11. The crash
> results in immediate termination of the backend process and forces a full
> instance restart.
>
>
> Hi Andril,
>
> I think the problem might comes from the credcheck extension. Please
> upgrade to version 4.3 of credcheck. Several possible crash have fixed
> since v3.0.
>
> Best regards.
>
> --
> Gilles Darold
>
>