My current version:
libblockdev-2.22-lp152.1.4.x86_64
libbd_lvm2-2.22-lp152.1.4.x86_64

First Issue:
libblockdev has wrong dependences as lvm-cache-stats need libbd_lvm2 so please
fix in the build

Second Issue:
running on a cached volume:
pc-diego:~ # lvdisplay /dev/nonraid/akonadi_data 
  --- Logical volume ---
  LV Path                /dev/nonraid/akonadi_data
  LV Name                akonadi_data
  VG Name                nonraid
  LV UUID                q00T3k-Xe2I-23Jd-4gnf-7kJl-g1mz-44ZhJJ
  LV Write Access        read/write
  LV Creation host, time pc-diego, 2018-04-19 15:26:08 +0200
  LV Cache pool name     akonadi_cache
  LV Cache origin name   akonadi_data_corig
  LV Status              available
  # open                 1
  LV Size                55.00 GiB
  Cache used blocks      0.00%
  Cache metadata blocks  0.67%
  Cache dirty blocks     0.00%
  Cache read hits/misses 0 / 61180
  Cache wrt hits/misses  0 / 260131
  Cache demotions        0
  Cache promotions       0
  Current LE             14080
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     1024
  Block device           254:9

pc-diego:~ # lvm-cache-stats /dev/nonraid/akonadi_data 
Failed to get stats for '/dev/nonraid/akonadi_data': Failed to create DM task
for the cache map '-dev/nonraid/akonadi_data':