gnome-extra/cinnamon currently has gnome-extra/cjs as a dependency, however it does not enforce the "cairo" flag that is required. Without the "cairo" flag Cinnamon won't start and will complain about missing "cairoNative" module in .xsession-errors log.
Created attachment 547050 [details, diff] gnome-extra/cinnamon-3.6.6-r2 patch to depend on gnome-extra/cjs[cairo]
Created attachment 547052 [details, diff] gnome-extra/cinnamon-3.8.8 patch to depend on gnome-extra/cjs[cairo]
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=999d64da43c7547c07e76226e7ded7fd3568e302 commit 999d64da43c7547c07e76226e7ded7fd3568e302 Author: Kristian Fiskerstrand <k_f@gentoo.org> AuthorDate: 2018-11-24 18:25:45 +0000 Commit: Kristian Fiskerstrand <k_f@gentoo.org> CommitDate: 2018-11-28 19:55:18 +0000 gnome-extra/cinnamon: New upstream version 4.0.3 Closes: https://bugs.gentoo.org/671296 Closes: https://bugs.gentoo.org/666388 Closes: https://bugs.gentoo.org/666386 Closes: https://bugs.gentoo.org/666382 Signed-off-by: Kristian Fiskerstrand <k_f@gentoo.org> Package-Manager: Portage-2.3.51, Repoman-2.3.11 gnome-extra/cinnamon/Manifest | 1 + gnome-extra/cinnamon/cinnamon-4.0.3.ebuild | 209 +++++++++++++++++++++++++++++ 2 files changed, 210 insertions(+)