skip-duplicates.log ( failed)

SKIP: tests/df/skip-duplicates
==============================

/
Filesystem     1K-blocks     Used Available Use% Mounted on
/dev/root       75085112 57875136  17193592  78% /
devtmpfs         8184096        0   8184096   0% /dev
tmpfs            8186724       84   8186640   1% /dev/shm
tmpfs            3274692     1108   3273584   1% /run
tmpfs               5120        0      5120   0% /run/lock
/dev/sdb16        901520    60632    777760   8% /boot
/dev/sdb15        106832     6250    100582   6% /boot/efi
/dev/sda1       76829444  4194336  68686668   6% /mnt
tmpfs            1637344       12   1637332   1% /run/user/1001
skip-duplicates.sh: skipped test: internal test failure: maybe LD_PRELOAD doesn't work?
SKIP tests/df/skip-duplicates.sh (exit status: 77)