bug#9907: 24.0.90; eshell:for command destructivly modifies list variables

[Andreas Politz]

M-x eshell

$ for l in $load-path {echo $l}

Do this two times. After the first time the value of `load-path' is
gone, because the lisp code implementing the loop destructively modifies
this list.  Idea of the following solution: Copy it.


diff -c -L /usr/share/emacs/24.0.90/lisp/eshell/esh-cmd.el.gz -L \#\<buffer\ 
esh-cmd.el.gz\> /tmp/jka-com2122MHr /tmp/buffer-content-2122LbA
*** /usr/share/emacs/24.0.90/lisp/eshell/esh-cmd.el.gz
--- #<buffer esh-cmd.el.gz>
***************
*** 494,500 ****
                               (if (listp elem)
                                   elem
                                 (list 'list elem))))
!                           (cdr (cddr terms)))))
                    (list 'eshell-command-body
                          (list 'quote (list nil)))
                    (list 'eshell-test-body
--- 494,501 ----
                               (if (listp elem)
                                   elem
                                 (list 'list elem))))
!                           (cdr (cddr terms)))
!                            (list nil)))
                    (list 'eshell-command-body
                          (list 'quote (list nil)))
                    (list 'eshell-test-body