A new upstream release containing a bugfix has been released. Current ebuild works unmodified.
commit 3dbb3048d5b234a49d603f39412ace4bad77ffd9 Author: Amy Liffey <amynka@gentoo.org> Date: Thu May 25 22:22:23 2017 +0200 app-misc/khal: version bump 0.9.5