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Date: Thu, 29 Aug 2013 12:48:46 +0300
From: Ivan Klymenko <fidaj@ukr.net>
To: freebsd-current@freebsd.org
Subject: make delete-old broken
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Hello.
In the interval between revisions >= r254887 to r255016
make delete-old broken

root@nonamehost:/ # cd /usr/src/
root@nonamehost:/usr/src # yes|make delete-old
make[1]: "tools/build/mk/tools/build/mk/OptionalObsoleteFiles.inc" line
1603: Malformed conditional (${MK_GNU_PATCH} == no) make[1]: Fatal
errors encountered -- cannot continue make[1]: stopped in /usr/src
*** Error code 1

Stop.
make: stopped in /usr/src

I can not say exactly at what revision it happened - but it was noticed
in revision r255016