If the EDITOR environment variable is not set to the absolute path of the editor, sys-apps/fcron-2.9.4's configure script will fail with: checking editor... configure: error: File vim is not an executable file To reproduce, do: EDITOR=vim emerge fcron. Doing EDITOR=$(which vim) emerge fcron works fine. The average user would most likely not run into this, since the default EDITOR is set in rc.conf with the absolute path.
Fixed in 2.0.2 and 2.9.5.1.
I think this bug has shown up again - please see bug #143279