Re: PG19beta1: GCC 16.1.1 warning: ‘actual_arg_types’ may be used uninitialized in clauses.c

From: Erik Rijkers <er(at)xs4all(dot)nl>
To: Nathan Bossart <nathandbossart(at)gmail(dot)com>, Álvaro Herrera <alvherre(at)kurilemu(dot)de>
Cc: Hans Buschmann <buschmann(at)nidsa(dot)net>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: PG19beta1: GCC 16.1.1 warning: ‘actual_arg_types’ may be used uninitialized in clauses.c
Date: 2026-06-17 15:27:35
Message-ID: dd1352c0-baf6-1a5b-8342-570ef9126777@xs4all.nl
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Op 6/17/26 om 16:39 schreef Nathan Bossart:
> On Fri, Jun 12, 2026 at 04:54:04PM +0200, Álvaro Herrera wrote:
>> On 2026-Jun-04, Nathan Bossart wrote:
>>> This code is ~18 years old, so I'm dubious there's a real problem here.
>>> Does something like this suppress the warning?
>>>
>>> Oid actual_arg_types[FUNC_MAX_ARGS] = {InvalidOid};
>>
>> I agree that it doesn't look like there's a real problem, and that
>> something like what you suggest should silence this warning. I mildly
>> prefer to do " = {0}" though, the rules for C incomplete initializers
>> being so weird. But I wouldn't oppose this patch as posted.
>
> WFM. Hans, can you confirm this fixes the issue?
>

FWIW, it silences that warning on my gcc 16.1.0

Erik

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