strange stable/9 buildworld failure

[Andriy Gapon]

buildword was run as make -j8 buildworld and the it mysteriously failed like this:

sh /usr/src/tools/install.sh -s -o root -g wheel -m 444     liblwres.so.80
/usr/obj/usr/src/tmp/usr/lib
sh /usr/src/tools/install.sh -l s liblwres.so.80
/usr/obj/usr/src/tmp/usr/lib/liblwres.so
1 error
*** [libraries] Error code 2


I could not find any actual error message in the build log.
/usr/obj was cleaned out before the build.

-- 
Andriy Gapon