loop=/dev/loop2
--- lsblk p1 (the bug input)
{"blockdevices":[{"name":"loop2p1","fstype":null,"pttype":"gpt","mountpoint":null}]}
--- blkid -p p1 (empty part)
DEVNAME=/dev/loop2p1
PART_ENTRY_SCHEME=gpt
PART_ENTRY_UUID=2b13a20b-f5a4-4906-9e30-985c170a50ad
PART_ENTRY_TYPE=0fc63daf-8483-4772-8e79-3d69d8477de4
PART_ENTRY_NUMBER=1
PART_ENTRY_OFFSET=2048
PART_ENTRY_SIZE=1048576
PART_ENTRY_DISK=7:2
rc=0
--- blkid -p p2 (ext4)
TYPE=ext4
PART_ENTRY_SCHEME=gpt
PART_ENTRY_NUMBER=2
rc=0
Re-reading the partition table failed.: Invalid argument
--- blkid -p p1 (a dos table inside)
PTTYPE=dos
PART_ENTRY_SCHEME=gpt
rc=0
ls: cannot access '/root/r1093-scratch.img': No such file or directory