Commit message doesn't mention it going away, and downgrading to -r4 gives me it back.
Specifically it's missing /usr/lib64/liblua.so one without a version. Maybe someone is working on eselect-lua? Either way, that's clearly not ready and this breaks things for me.
Specifically a project is using a fairly standard cmake script to include lua, which ends up returning /usr/lib64/liblua.so, even though it's not installed
*** Bug 706254 has been marked as a duplicate of this bug. ***
*** Bug 706334 has been marked as a duplicate of this bug. ***