This bug was fixed in the package kwin - 4:5.12.9.1-0ubuntu0.1
--------------- kwin (4:5.12.9.1-0ubuntu0.1) bionic; urgency=medium
* New upstream bugfix release (5.12.9) (LP: #1843613) * New upstream bugfix release (5.12.9.1) - Fixes compilation of 5.12.9 with Qt 5.9
-- Rik Mills <email address hidden> Thu, 12 Sep 2019 10:41:23 +0100
This bug was fixed in the package kwin - 4:5.12. 9.1-0ubuntu0. 1
--------------- 9.1-0ubuntu0. 1) bionic; urgency=medium
kwin (4:5.12.
* New upstream bugfix release (5.12.9) (LP: #1843613)
* New upstream bugfix release (5.12.9.1)
- Fixes compilation of 5.12.9 with Qt 5.9
-- Rik Mills <email address hidden> Thu, 12 Sep 2019 10:41:23 +0100