At least GPL-2 is missing it is one of many licenses in /supertuxkart-0.9.2/data/textures/License.txt Probably there are many more, one would have to check the other folders too.
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=c54b137b51007e99c897c74b75c14803f504a59b commit c54b137b51007e99c897c74b75c14803f504a59b Author: James Le Cuirot <chewi@gentoo.org> AuthorDate: 2019-05-10 21:33:40 +0000 Commit: James Le Cuirot <chewi@gentoo.org> CommitDate: 2019-05-10 21:34:02 +0000 games-action/supertuxkart: Update licenses Closes: https://bugs.gentoo.org/598493 Package-Manager: Portage-2.3.66, Repoman-2.3.12 Signed-off-by: James Le Cuirot <chewi@gentoo.org> games-action/supertuxkart/supertuxkart-1.0.ebuild | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)