This bug was fixed in the package initramfs-tools - 0.130ubuntu10
--------------- initramfs-tools (0.130ubuntu10) cosmic; urgency=medium
* Avoid redundant call to dmsetup.
-- Steve Langasek <email address hidden> Thu, 14 Jun 2018 22:26:51 -0700
This bug was fixed in the package initramfs-tools - 0.130ubuntu10
---------------
initramfs-tools (0.130ubuntu10) cosmic; urgency=medium
* Avoid redundant call to dmsetup.
-- Steve Langasek <email address hidden> Thu, 14 Jun 2018 22:26:51 -0700