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

Nathan Bossart <nathandbossart@gmail.com>

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From: Nathan Bossart <nathandbossart@gmail.com>
To: Álvaro Herrera <alvherre@kurilemu.de>
Cc: Hans Buschmann <buschmann@nidsa.net>, "pgsql-hackers@postgresql.org" <pgsql-hackers@postgresql.org>
Date: 2026-06-17T14:39:18Z
Lists: pgsql-hackers 
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?

-- 
nathan

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  1. Silence "may be used uninitialized" compiler warning.