bug#11970: EIEIO accessors no longer work with setf in Emacs HEAD

[Eric Schulte]

The following example demonstrates this problem.

    ;; -*- emacs-lisp -*-
    (require 'eieio)

    (defclass foo nil
      ((bar :initarg :bar :accessor bar :initform nil)))

    (setf *foo* (make-instance foo :bar :baz))

    (bar *foo*)
    ;; => :baz

    (setf (bar *foo*) :quz)
    ;; => (error "(bar *foo*) is not a valid place expression")

This works in Emacs 24, and (I believe) should still work.

Best,

-- 
Eric Schulte
http://cs.unm.edu/~eschulte