From: Tom Lane <tgl@sss.pgh.pa.us>
To: Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
cc: Magnus Hagander <magnus@hagander.net>,
        PostgreSQL WWW <pgsql-www@lists.postgresql.org>
Subject: Re: Bogus reports from coverage.postgresql.org
In-reply-to: <bc1608e2-41ad-4c07-f939-e165944eb163@2ndquadrant.com>
References: <30022.1520642188@sss.pgh.pa.us>
 <d0eec0fd-bf3b-55da-f5de-4fa1c00ce400@2ndquadrant.com>
 <CABUevEyydszbZJPF6iyjU45C+Kx4YSCa+KDZJkXNdjiGbE0Ojg@mail.gmail.com>
 <30195.1520790475@sss.pgh.pa.us> <30669.1520791101@sss.pgh.pa.us>
 <CABUevEx5Q0YEPrsdUL75BB0z+Ns3m7eX=x3oRwttjHRJ0HeQRw@mail.gmail.com>
 <31446.1520791925@sss.pgh.pa.us> <1594.1520795000@sss.pgh.pa.us>
 <2633.1520796277@sss.pgh.pa.us>
 <bc1608e2-41ad-4c07-f939-e165944eb163@2ndquadrant.com>
Comments: In-reply-to Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
	message dated "Sun, 11 Mar 2018 15:52:19 -0400"
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-ID: <13147.1520798486.1@sss.pgh.pa.us>
Date: Sun, 11 Mar 2018 16:01:26 -0400
Message-ID: <13148.1520798486@sss.pgh.pa.us>
Precedence: bulk

Peter Eisentraut <peter.eisentraut@2ndquadrant.com> writes:
> I tried it on Debian stable with gcc 6.3.0 and couldn't reproduce it.
> cc (Debian 6.3.0-18+deb9u1) 6.3.0 20170516

Oh ... *that's* interesting.  Are we sure this is the version in use
on coverage.postgresql.org?

Also, I just finished searching in vain for any plausibly-matching
bug at https://gcc.gnu.org/bugzilla/.  I did find a few reports
suggesting that gcov could misbehave with nondefault build options
such as LTO.  And "gcov -a" has also had issues.  So maybe we ought
to have a look at exactly what coverage.postgresql.org's build
recipe is.

			regards, tom lane