* cl-generic.el (cl-generic-generalizers): Clean up after braindamage

diff --git a/lisp/emacs-lisp/cl-generic.el b/lisp/emacs-lisp/cl-generic.el
index c9ca92d7c09b3886bd1d36702e1999ba21918762..fb11a3e25a1e49ba5893d70ec2d91e7d423b10dd 100644 (file)
--- a/lisp/emacs-lisp/cl-generic.el
+++ b/lisp/emacs-lisp/cl-generic.el
@@ -903,8 +903,8 @@ Can only be used from within the lexical body of a primary or around method."
      ;; take place without requiring cl-lib.
      (let ((class (cl--find-class type)))
        (and (cl-typep class 'cl-structure-class)
-            (when (cl--struct-class-type class)
-              (error "Can't dispatch on cl-struct %S: type is %S"
+            (or (null (cl--struct-class-type class))
+               (error "Can't dispatch on cl-struct %S: type is %S"
                      type (cl--struct-class-type class)))
             (progn (cl-assert (null (cl--struct-class-named class))) t)
             (list cl--generic-struct-generalizer))))