Re: Assert triggered during RE_compile_and_cache

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Mark Dilger <mark(dot)dilger(at)enterprisedb(dot)com>
Cc: PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Assert triggered during RE_compile_and_cache
Date: 2021-08-06 00:13:03
Message-ID: 2442241.1628208783@sss.pgh.pa.us
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I wrote:
> Hm. I thought that this might be an old issue, but I'm not seeing the
> crash in pre-v14 branches. That means it's some bug introduced in
> the performance improvements I did a few months ago. Open item added.

git bisect says the trouble started with

ea1268f6301cc7adce571cc9c5ebe8d9342a2ef4 is the first bad commit
commit ea1268f6301cc7adce571cc9c5ebe8d9342a2ef4
Author: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Date: Sat Feb 20 19:26:41 2021 -0500

Avoid generating extra subre tree nodes for capturing parentheses.

I probably won't be able to dig deeper for a little while.

regards, tom lane

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