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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Bruce Momjian <bruce@momjian.us>
Cc: Alexander Korotkov <aekorotkov@gmail.com>
Cc: Andrey Borodin <x4mmm@yandex-team.ru>
Cc: Peter Geoghegan <pg@bowt.ie>
Cc: Andres Freund <andres@anarazel.de>
Cc: chenhj <chjischj@163.com>
Cc: Teodor Sigaev <teodor@sigaev.ru>
Cc: PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Subject: Re: Connections hang indefinitely while taking a gin index's LWLock buffer_content lock
Date: Thu, 13 Dec 2018 11:48:33 -0500
Message-ID: <5002.1544719713@sss.pgh.pa.us> (raw)
In-Reply-To: <20181213153232.GA10664@momjian.us>
References: <CAPpHfdvSRo7cKYTO5xFx6J+GW6Wkqm69Crybwza9S+EcQTXjhQ@mail.gmail.com>
	<5849302B-3D98-4C09-BD43-277D0E051D2B@yandex-team.ru>
	<CAPpHfds_nVAbF-2uwhLiJ4PWXt_1b4xTosFOjQPi5TscbUaRzw@mail.gmail.com>
	<ACFDB1E2-31C1-4C30-B6C1-022F7B93EC8F@yandex-team.ru>
	<D22045C2-9635-4219-8E45-1F590E735C8A@yandex-team.ru>
	<CAPpHfdvnM9ovN09Q1qW36X_R4w4muaYgRSeL2indZOEn6UMFng@mail.gmail.com>
	<C08044E4-2FAF-4FF9-AC58-94C0484CC750@yandex-team.ru>
	<CAPpHfdvR+RxoOGFSSFmzwZ45RFRc3Pgt9YaQzYKQ1z-=idBTeg@mail.gmail.com>
	<1C6E203B-71D9-46D1-AB8F-19A75323C2BE@yandex-team.ru>
	<CAPpHfdsJAfmTdbRxhERYGefbuZHx0Tcu6swz65Xf8C24jgofBA@mail.gmail.com>
	<20181213153232.GA10664@momjian.us>

Bruce Momjian <bruce@momjian.us> writes:
> I am seeing this warning in the 9.4 branch:
> 	ginxlog.c:756:5: warning: ‘lbuffer’ may be used uninitialized
> 	in this function [-Wmaybe-uninitialized]

I'm also getting that, just in 9.4, but at a different line number:

ginxlog.c: In function 'ginRedoDeletePage':
ginxlog.c:693: warning: 'lbuffer' may be used uninitialized in this function

That's with gcc version 4.4.7 20120313 (Red Hat 4.4.7-23)

			regards, tom lane




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  Cc: tgl@sss.pgh.pa.us, bruce@momjian.us, aekorotkov@gmail.com, x4mmm@yandex-team.ru, pg@bowt.ie, andres@anarazel.de, chjischj@163.com, teodor@sigaev.ru, pgsql-hackers@lists.postgresql.org
  Subject: Re: Connections hang indefinitely while taking a gin index's LWLock buffer_content lock
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