Try to install libsigsegv and then rebuild diffutils: it'll be linked to libsigsegv. I noticed this in the tinderbox because of this: * GNU info directory index is up-to-date. diff: error while loading shared libraries: libsigsegv.so.0: cannot open shared object file: No such file or directory ERROR: 'diff -uN %file1 %file2' does not seem to work, aborting tweet: net-misc/slimrat queued With the compliments of gnulib.
Fixed in 2.9-r1.