This bug was fixed in the package btrfs-tools - 4.4-1ubuntu1
--------------- btrfs-tools (4.4-1ubuntu1) xenial; urgency=medium
* debian/patches/09c052a8b4dcaa96fe5e6c28b12ce24729e827a4.patch: backport upstream commit to add new "quiet option" and prevent printing of messages on stderr (LP: #1694891)
-- Gianfranco Costamagna <email address hidden> Wed, 14 Jun 2017 19:48:16 +0200
This bug was fixed in the package btrfs-tools - 4.4-1ubuntu1
---------------
btrfs-tools (4.4-1ubuntu1) xenial; urgency=medium
* debian/ patches/ 09c052a8b4dcaa9 6fe5e6c28b12ce2 4729e827a4. patch:
backport upstream commit to add new "quiet option" and prevent printing of
messages on stderr (LP: #1694891)
-- Gianfranco Costamagna <email address hidden> Wed, 14 Jun 2017 19:48:16 +0200