[gentoo-portage-dev] %n in writable segment detected ??

[Duncan]

What's the below "%n in writable segment detected" bit all about?  Should 
I worry about it?  I saw it once before but have no clue whether it's 
portage/emerge itself outputting it (I would guess yes, QA warning??), or 
one of the build processes.

I'm guessing it's a warning from portage's newer parallel jobs processing 
that you guys may be interested in (a bug to trace down?  file it??  any 
other info beyond the below that would be useful?  how to duplicate? 
etc.) but don't know and obviously haven't the foggiest how serious it 
is.  But it didn't cause anything to barf, so I figured it couldn't be 
too bad.  But it's still worrying not knowing what it is, when it's 
obviously important enough to break the parallel jobs enforced 
backgrounding.

~amd64/2008.0/no-multilib, portage-2.2_rc25 (now, previously with a 
different _rc)

Would you like to merge these packages? [Yes/No]
>>> Verifying ebuild manifests
>>> Starting parallel fetch
>>> Emerging (1 of 5) sys-devel/gnuconfig-20090203
>>> Emerging (2 of 5) sys-apps/sandbox-1.6
>>> Installing sys-devel/gnuconfig-20090203
>>> Installing sys-apps/sandbox-1.6
>>> Emerging (3 of 5) sys-fs/udev-140
>>> Emerging (4 of 5) sys-apps/coreutils-7.1
>>> Jobs: 2 of 5 complete, 1 running                Load avg: 4.81, 3.95,
2.11*** %n in writable segment detected ***

Thanks!

-- 
Duncan - List replies preferred.   No HTML msgs.
"Every nonfree program has a lord, a master --
and if you use the program, he is your master."  Richard Stallman