From: Tom Lane <tgl@sss.pgh.pa.us>
To: pgsql-committers@lists.postgresql.org
Subject: pgsql: MemoryContextCreate: assert parent is valid and different from n
Date: Mon, 21 Apr 2025 15:34:49 +0000
Message-ID: <E1u6tAX-0017pz-1E@gemulon.postgresql.org> (raw)
MemoryContextCreate: assert parent is valid and different from node.
The case of "node == parent" might seem impossible, since we just
allocated the new node. But it's possible if parent is a dangling
reference to a recently-deleted context. In fact, given aset.c's
habit of recycling contexts, it's actually rather likely if that's so.
If we'd had this assertion before, it would have simplified debugging
a recently-identified walsender issue.
Reported-by: Anthonin Bonnefoy <anthonin.bonnefoy@datadoghq.com>
Author: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/CAO6_XqoJA7-_G6t7Uqe5nWF3nj+QBGn4F6Ptp=rUGDr0zo+KvA@mail.gmail.com
Branch
------
master
Details
-------
https://git.postgresql.org/pg/commitdiff/5ec8b01c30e7ea34bb42592ad9d34d4b02ea593d
Modified Files
--------------
src/backend/utils/mmgr/mcxt.c | 4 ++++
1 file changed, 4 insertions(+)
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To: pgsql-committers@postgresql.org
Cc: tgl@sss.pgh.pa.us, pgsql-committers@lists.postgresql.org
Subject: Re: pgsql: MemoryContextCreate: assert parent is valid and different from n
In-Reply-To: <E1u6tAX-0017pz-1E@gemulon.postgresql.org>
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