🚀 go-pugleaf

Here's a simple way to crash Emacs using 'apply' and 'autoload'.  In the
Emacs Lisp library, create a file, say "foo.el", with a single 'defun':

------------------------------------------------------------------
(defun fun1 ())
------------------------------------------------------------------

       then evaluate three forms:

------------------------------------------------------------------
(autoload 'fun1 "foo")

(defun fun2 ()
       (apply (symbol-function 'fun1) ()))

(fun2)
------------------------------------------------------------------

The third form kills Emacs with a segmentation fault.

We used version 18.55 on our Sun 3/280 with OS 4.0.3 and the bug
appeared even in an emacs session started with 'emacs -q' (without any
customized initialization).  Yet another test, also ending with a
segmentation fault, had an 'autoload' with a full pathname for 'foo.el'.
The same test with 18.55 on a DecStation 3100 caused the error
message "End of file during parsing", but did not result in a crash.

Alex Zatsman
Software Options, Inc.
Cambridge, MA 02138