From: Tom Lane <tgl@sss.pgh.pa.us>
To: Alexander Korotkov <aekorotkov@gmail.com>
cc: "Efrain J. Berdecia" <ejberdecia@yahoo.com>, Peter Geoghegan <pg@bowt.ie>,
        "pgsql-bugs@lists.postgresql.org" <pgsql-bugs@lists.postgresql.org>
Subject: Re: BUG #17229: Segmentation Fault after upgrading to version 13
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Comments: In-reply-to Alexander Korotkov <aekorotkov@gmail.com>
	message dated "Tue, 26 Oct 2021 02:20:59 +0300"
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Date: Mon, 25 Oct 2021 19:28:51 -0400
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Alexander Korotkov <aekorotkov@gmail.com> writes:
> On Mon, Oct 25, 2021 at 4:49 PM Efrain J. Berdecia <ejberdecia@yahoo.com=
> wrote:
>> On a separate note, applying 13.4 on a running cluster caused some issu=
es with;
>> "could not load library "/usr/pgsql-13/lib/plpgsql.so": /usr/pgsql-13/l=
ib/plpgsql.so: undefined symbol: EnsurePortalSnapshotExists"

That sounds a lot like the OP hadn't actually restarted the server,
or at least not right away.  A 13.4 plpgsql.so loading into a 13.3
server would do that.

> Not sure what is our policy on introducing incompatibilities between
> extensions and postgres binary in minor releases...

We've done that before, we'll do it again.  You can't realistically
fix many bugs without adding new functions.

			regards, tom lane