Message-ID: <e544c795-2c7a-e662-19d2-e34da12bfa66@enterprisedb.com>
Date: Wed, 23 Feb 2022 16:41:22 +0100
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Subject: Re: BUG #17406: Segmentation fault on GiST index after 14.2 upgrade
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From: Tomas Vondra <tomas.vondra@enterprisedb.com>
To: Victor Yegorov <vyegorov@gmail.com>
Cc: PostgreSQL mailing lists <pgsql-bugs@lists.postgresql.org>,
 Alexander Korotkov <aekorotkov@gmail.com>
References: <17406-71e02820ae79bb40@postgresql.org>
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 <c733dae0-15ba-bcdd-e465-1a9f2fdefebf@enterprisedb.com>
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On 2/23/22 16:36, Tomas Vondra wrote:
>>
>> I got approval to send a table with its data and index in the subject
>> datafile.
>> Taken from the v14 database.
>>
> 
> Thanks for the data! I've been able to reproduce the issue (load into
> 12, pg_upgrade to 14 and run the query). After bisecting this for a
> while, this seems like a bug in PG13 commit
> 
> commit 911e70207703799605f5a0e8aad9f06cff067c63 (HEAD)
> Author: Alexander Korotkov <akorotkov@postgresql.org>
> Date:   Mon Mar 30 19:17:11 2020 +0300
> 
>     Implement operator class parameters
> 
>     ...
> 
> It works fine when upgrading to an earlier build, and crashes since this
> commit. I haven't investigated this further, but I guess there's some
> thinko in gist_ltree_ops, affecting how we interpret existing indexes.
> 
> Alexander, any ideas?
> 

Sorry, I accidentally used Alexander's old address, so let me CC him
with the correct/current one.


regards

-- 
Tomas Vondra
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