This bug was fixed in the package partman-crypto - 86ubuntu2
--------------- partman-crypto (86ubuntu2) bionic; urgency=medium
* lib/crypto-base.sh: don't regard zram devices as "unsafe", since we know these are entirely RAM-backed. LP: #1759732.
-- Steve Langasek <email address hidden> Wed, 04 Apr 2018 17:07:27 -0700
This bug was fixed in the package partman-crypto - 86ubuntu2
---------------
partman-crypto (86ubuntu2) bionic; urgency=medium
* lib/crypto-base.sh: don't regard zram devices as "unsafe", since we
know these are entirely RAM-backed. LP: #1759732.
-- Steve Langasek <email address hidden> Wed, 04 Apr 2018 17:07:27 -0700