Comment 27 for bug 1842437

Verification done with xenial-proposed.

# dpkg -s libblkid1 | grep -i version
Version: 2.27.1-6ubuntu3.9

# apt-cache madison libblkid1 | grep xenial-proposed
 libblkid1 | 2.27.1-6ubuntu3.9 | http://archive.ubuntu.com/ubuntu xenial-proposed/main amd64 Packages

Test steps are described in comment #6.

Only one filesystem (ext4) is detected:

# udevadm test-builtin blkid /sys/block/$(basename $dev)/$(basename $part)
...
ID_FS_UUID=aadbf085-7ce7-43e4-a149-ad11d997b710
ID_FS_UUID_ENC=aadbf085-7ce7-43e4-a149-ad11d997b710
ID_FS_VERSION=1.0
ID_FS_TYPE=ext4
ID_FS_USAGE=filesystem
...

# echo $?
0

The verbose log shows nilfs is not detected:

# LIBBLKID_DEBUG=all udevadm test-builtin blkid /sys/block/$(basename $dev)/$(basename $part)
...
2177: libblkid: LOWPROBE: [63] nilfs2:
2177: libblkid: LOWPROBE: call probefunc()
2177: libblkid: LOWPROBE: reuse buffer: off=1024 len=1024 pr=0x5598289abc80
2177: libblkid: LOWPROBE: reuse buffer: off=16772608 len=4096 pr=0x5598289abc80
2177: libblkid: LOWPROBE: [64] exfat:
...