Your bug report #43638: [feature/native-comp] (setf seq-elt) is already defined as something else than a generic function which was filed against the emacs package, has been closed. The explanation is attached below, along with your original report. If you require more details, please reply to 43638@debbugs.gnu.org. -- 43638: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=43638 GNU Bug Tracking System Contact help-debbugs@gnu.org with problems