lvdisplay command with -m switch produces segfault for cached logical volumes and cached POOL LVs

Issue

• lvdisplay command with -m switch produces segfault for cached logical volumes and cached POOL LVs.

[root@vm252-103 ~]# lvdisplay -vm /dev/example_vg/lv1 
  --- Logical volume ---
  LV Path                /dev/example_vg/lv1
  LV Name                lv1
  VG Name                example_vg
  LV UUID                LfgUSi-VQLP-Nueh-PYXp-ysCp-GFzL-92flsq
  LV Write Access        read/write
  LV Creation host, time vm252-103.gsslab.pnq2.redhat.com, 2018-01-10 18:41:45 +0530
  LV Cache pool name     lv_cache
  LV Cache origin name   lv1_corig
  LV Status              available
  # open                 1
  LV Size                4.00 GiB
  Cache used blocks      0.14%
  Cache metadata blocks  0.14%
  Cache dirty blocks     0.00%
  Cache read hits/misses 10 / 49
  Cache wrt hits/misses  18 / 37
  Cache demotions        0
  Cache promotions       18
  Current LE             1024
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     8192
  Block device           253:2

  --- Segments ---
  Logical extents 0 to 1023:
    Type        cache
    Chunk size      64.00 KiB
    Metadata format 2
    Mode        writethrough
    Policy      smq
Segmentation fault (core dumped)   <-----------------