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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: Hans Buschmann <buschmann@nidsa.net>
Cc: "pgsql-hackers@postgresql.org" <pgsql-hackers@postgresql.org>
Date: 2026-06-04T15:07:48Z
Lists: pgsql-hackers 
On Thu, Jun 04, 2026 at 02:42:18PM +0000, Hans Buschmann wrote:
> 839/2360] Compiling C object src/backend/postgres_lib.a.p/optimizer_util_clauses.c.o
> ../src/backend/optimizer/util/clauses.c: In function ‘recheck_cast_function_args.isra’:
> ../src/backend/optimizer/util/clauses.c:5152:19: warning: ‘actual_arg_types’ may be used uninitialized [-Wmaybe-uninitialized]
>  5152 |         rettype = enforce_generic_type_consistency(actual_arg_types,

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};

-- 
nathan

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