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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
Cc: Magnus Hagander <magnus@hagander.net>
Cc: PostgreSQL WWW <pgsql-www@lists.postgresql.org>
Subject: Re: Bogus reports from coverage.postgresql.org
Date: Sun, 11 Mar 2018 16:01:26 -0400
Message-ID: <13148.1520798486@sss.pgh.pa.us> (raw)
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>

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




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