/usr/share/octave/site/m/vlfeat/toolbox/xtest/ is in octave-vlfeat 0.9.17+dfsg0-6build1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/octave/site/m/vlfeat/toolbox/xtest/vl_assert_almost_equal.m
/usr/share/octave/site/m/vlfeat/toolbox/xtest/vl_assert_equal.m
/usr/share/octave/site/m/vlfeat/toolbox/xtest/vl_assert_exception.m
/usr/share/octave/site/m/vlfeat/toolbox/xtest/vl_test.m
/usr/share/octave/site/m/vlfeat/toolbox/xtest/vl_test_aib.m
/usr/share/octave/site/m/vlfeat/toolbox/xtest/vl_test_alldist.m
/usr/share/octave/site/m/vlfeat/toolbox/xtest/vl_test_alldist2.m
/usr/share/octave/site/m/vlfeat/toolbox/xtest/vl_test_alphanum.m
/usr/share/octave/site/m/vlfeat/toolbox/xtest/vl_test_argparse.m
/usr/share/octave/site/m/vlfeat/toolbox/xtest/vl_test_binsearch.m
/usr/share/octave/site/m/vlfeat/toolbox/xtest/vl_test_binsum.m
/usr/share/octave/site/m/vlfeat/toolbox/xtest/vl_test_colsubset.m
/usr/share/octave/site/m/vlfeat/toolbox/xtest/vl_test_cummax.m
/usr/share/octave/site/m/vlfeat/toolbox/xtest/vl_test_fisher.m
/usr/share/octave/site/m/vlfeat/toolbox/xtest/vl_test_gmm.m
/usr/share/octave/site/m/vlfeat/toolbox/xtest/vl_test_grad.m
/usr/share/octave/site/m/vlfeat/toolbox/xtest/vl_test_hikmeans.m
/usr/share/octave/site/m/vlfeat/toolbox/xtest/vl_test_hog.m
/usr/share/octave/site/m/vlfeat/toolbox/xtest/vl_test_homkermap.m
/usr/share/octave/site/m/vlfeat/toolbox/xtest/vl_test_ihashsum.m
/usr/share/octave/site/m/vlfeat/toolbox/xtest/vl_test_ikmeans.m
/usr/share/octave/site/m/vlfeat/toolbox/xtest/vl_test_imarray.m
/usr/share/octave/site/m/vlfeat/toolbox/xtest/vl_test_imdisttf.m
/usr/share/octave/site/m/vlfeat/toolbox/xtest/vl_test_imintegral.m
/usr/share/octave/site/m/vlfeat/toolbox/xtest/vl_test_imsmooth.m
/usr/share/octave/site/m/vlfeat/toolbox/xtest/vl_test_imwbackward.m
/usr/share/octave/site/m/vlfeat/toolbox/xtest/vl_test_init.m
/usr/share/octave/site/m/vlfeat/toolbox/xtest/vl_test_inthist.m
/usr/share/octave/site/m/vlfeat/toolbox/xtest/vl_test_kdtree.m
/usr/share/octave/site/m/vlfeat/toolbox/xtest/vl_test_kmeans.m
/usr/share/octave/site/m/vlfeat/toolbox/xtest/vl_test_lbp.m
/usr/share/octave/site/m/vlfeat/toolbox/xtest/vl_test_liop.m
/usr/share/octave/site/m/vlfeat/toolbox/xtest/vl_test_mser.m
/usr/share/octave/site/m/vlfeat/toolbox/xtest/vl_test_phow.m
/usr/share/octave/site/m/vlfeat/toolbox/xtest/vl_test_plotbox.m
/usr/share/octave/site/m/vlfeat/toolbox/xtest/vl_test_pr.m
/usr/share/octave/site/m/vlfeat/toolbox/xtest/vl_test_printsize.m
/usr/share/octave/site/m/vlfeat/toolbox/xtest/vl_test_roc.m
/usr/share/octave/site/m/vlfeat/toolbox/xtest/vl_test_slic.m
/usr/share/octave/site/m/vlfeat/toolbox/xtest/vl_test_svmtrain.m
/usr/share/octave/site/m/vlfeat/toolbox/xtest/vl_test_twister.m
/usr/share/octave/site/m/vlfeat/toolbox/xtest/vl_test_vlad.m
/usr/share/octave/site/m/vlfeat/toolbox/xtest/vl_test_whistc.m