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Date:      Sat, 13 Jun 2020 22:30:47 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 246630] stable/11 regression: base.txz reproducibility depends on number of cpu cores
Message-ID:  <bug-246630-227-0sf0YCszWQ@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-246630-227@https.bugs.freebsd.org/bugzilla/>
References:  <bug-246630-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D246630

--- Comment #33 from Dimitry Andric <dim@FreeBSD.org> ---
Created attachment 215531
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D215531&action=
=3Dedit
Merge llvm-project commit 0cecafd647cc

I have been able to consistently reproduce the different outputs with a scr=
ipt,
and by bisecting on a 11.x machine (which took a LONG time!) I found that
upstream's https://reviews.llvm.org/rG0cecafd647cc fixes it for my case.

That is, resetting CLANG_SPAWN_CC1 back to 0 and merging the non-test parts=
 of
the upstream change into our contrib/llvm-project seems to make this output
reproducible again for me.

I would appreciate it if you could apply this on your various systems as a
test-run, and check if it now produces consistent output every time.

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