1./dstack.tests: line 6: pushd: /tmp/xxx-notthere: No such file or directory 2./dstack.tests: line 9: pushd: no other directory 3./dstack.tests: line 10: popd: directory stack empty 4./dstack.tests: line 13: pushd: -m: invalid number 5pushd: usage: pushd [dir | +N | -N] [-n] 6./dstack.tests: line 14: popd: -m: invalid number 7popd: usage: popd [+N | -N] [-n] 8./dstack.tests: line 15: dirs: -m: invalid number 9dirs: usage: dirs [-clpv] [+N] [-N] 10./dstack.tests: line 16: dirs: 7: invalid option 11dirs: usage: dirs [-clpv] [+N] [-N] 12/ 13ok 14/usr / 15/usr / 16/usr / 17/usr / 18/usr / 19/ 20/usr / 21/etc /usr / 22/etc /usr / 23/etc /usr / 24 0 /etc 25 1 /usr 26 2 / 27/usr /etc / 28/etc /usr / 29/tmp /etc /usr / 30/tmp 31/tmp 32/usr 33/usr 34./dstack.tests: line 58: dirs: 9: directory stack index out of range 35./dstack.tests: line 58: dirs: 9: directory stack index out of range 36./dstack.tests: line 59: pushd: +9: directory stack index out of range 37./dstack.tests: line 59: pushd: -9: directory stack index out of range 38./dstack.tests: line 60: popd: +9: directory stack index out of range 39./dstack.tests: line 60: popd: -9: directory stack index out of range 40/tmp /etc / 41/tmp /etc / 42/tmp /etc / 43/tmp /usr /etc / 44/tmp 45/tmp /usr /etc / 46/tmp /usr /etc / 47/tmp 48/tmp /bin /etc / 49/tmp 50/tmp /bin / 51/tmp 52/bin / /tmp 53/bin / /tmp 54/bin 55/bin 56