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help / color / mirror / Atom feedFrom: Noah Misch <[email protected]>
To: Tom Lane <[email protected]>
Cc: Thomas Munro <[email protected]>
Cc: [email protected]
Cc: [email protected]
Subject: Re: BUG #19406: substring(text) fails on valid UTF-8 toasted value in PostgreSQL 15.16
Date: Mon, 16 Feb 2026 20:20:43 -0800
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
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On Mon, Feb 16, 2026 at 01:21:45PM -0500, Tom Lane wrote:
> Noah Misch <[email protected]> writes:
> > Pushed as commit 9f4fd11
>
> Various BF animals are complaining
>
> varlena.c: In function 'text_substring':
> varlena.c:590:9: warning: 'E' may be used uninitialized in this function [-Wmaybe-uninitialized]
> int32 E; /* end position, exclusive */
> ^
>
> and I've also seen that locally depending on which gcc version and -O
> level I'm using. Could we silence that?
>
>
> bollworm | 2026-02-16 09:32:03 | varlena.c:590:9: warning: 'E' may be used uninitialized in this function [-Wmaybe-uninitialized]
> camel | 2026-02-16 09:32:30 | varlena.c:590:9: warning: 'E' may be used uninitialized in this function [-Wmaybe-uninitialized]
> chimaera | 2026-02-16 11:40:29 | /home/debian/20-chimaera/buildroot/HEAD/pgsql.build/../pgsql/src/backend/utils/adt/varlena.c:739:5: warning: 'E' may be used uninitialized in this function [-Wmaybe-uninitialized]
> comma | 2026-02-16 14:55:48 | varlena.c:590:9: warning: 'E' may be used uninitialized in this function [-Wmaybe-uninitialized]
> conchuela | 2026-02-16 15:20:01 | varlena.c:590:9: warning: 'E' may be used uninitialized in this function [-Wmaybe-uninitialized]
> flea | 2026-02-16 09:31:52 | varlena.c:590:9: warning: 'E' may be used uninitialized in this function [-Wmaybe-uninitialized]
> krait | 2026-02-16 09:50:17 | varlena.c:590:9: warning: 'E' may be used uninitialized in this function [-Wmaybe-uninitialized]
> pipit | 2026-02-15 02:36:02 | varlena.c:590:9: warning: 'E' may be used uninitialized in this function [-Wmaybe-uninitialized]
> urocryon | 2026-02-15 01:45:07 | varlena.c:739:5: warning: 'E' may be used uninitialized in this function [-Wmaybe-uninitialized]
> wireworm | 2026-02-16 15:20:49 | varlena.c:590:9: warning: 'E' may be used uninitialized in this function [-Wmaybe-uninitialized]
> ziege | 2026-02-15 01:18:25 | varlena.c:590:9: warning: 'E' may be used uninitialized in this function [-Wmaybe-uninitialized]
Thanks. I've pushed commit 8cef93d.
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To: [email protected]
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Subject: Re: BUG #19406: substring(text) fails on valid UTF-8 toasted value in PostgreSQL 15.16
In-Reply-To: <[email protected]>
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