Hello. subversion.eclass exports src_prepare, which just calls subversion_bootstrap, which applies all sorts of patches but doesn't call eapply_user. This makes subversion.eclass incompatible with EAPI>=6. Please fix.
https://gitweb.gentoo.org/repo/gentoo.git/commit/eclass/subversion.eclass?id=7397807631f633871886d506bf80c598c8c6e1e1 This was fixed by @bircoph.