From mboxrd@z Thu Jan  1 00:00:00 1970
From: Dave Love <fx@gnu.org>
Subject: debugging cycles in build
Date: Wed, 26 Jul 2017 17:39:22 +0100
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I changed a package to have a "lib" output, which failed because it
detected a cycle (whereas it's OK with everything in "out").  Is there a
good way to debug that?  I couldn't easily find the code implementing
the check.