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From: Andres Freund <[email protected]>
To: Alexander Korotkov <[email protected]>
Cc: Richard Guo <[email protected]>
Cc: PostgreSQL-development <[email protected]>
Subject: Re: Assert failure on 'list_member_ptr(rel->joininfo, restrictinfo)'
Date: Tue, 14 Nov 2023 22:04:21 -0800
Message-ID: <[email protected]> (raw)
In-Reply-To: <CAPpHfdvX3Ht9nY3YJCrb7mbsvHEHXvhug8wsEvZ0v38866ncHA@mail.gmail.com>
References: <CAMbWs4_wJthNtYBL+SsebpgF-5L2r5zFFk6xYbS0A78GKOTFHw@mail.gmail.com>
	<CAPpHfdvX3Ht9nY3YJCrb7mbsvHEHXvhug8wsEvZ0v38866ncHA@mail.gmail.com>

Hi,

On 2023-11-14 14:42:13 +0200, Alexander Korotkov wrote:
> It's possibly dumb option, but what about just removing the assert?

That's not at all an option - the in-place bms_* functions can free their
input. So a dangling pointer to the "old" version is a use-after-free waiting
to happen - you just need a query that actually gets to bitmapsets that are a
bit larger.

Greetings,

Andres

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