bug#7946: Referring to a marker changes Emacs' behaviour.

[Le Wang]

Hi,

I found an issue where evaluating this line or not causes Emacs behaviour change:

(format "%s" marked-point)

"marked-point" is a marker.  The bug was found on NTEmacs 23.2.1, reproed on CVS NTEmacs 20110111, and Stephen Berman confirmed it on GNU Emacs 24.0.50.1

(i686-pc-linux-gnu, GTK+ Version 2.20.1) of 2011-01-13 on escher

"rebox2_bug.el" is attached to this message.

Repro-steps:

1. emacs -Q rebox2_bug.el
2. M-x eval-current-buffer
3. C-x b<enter> ;; switch to "*scratch*"
4. M-x rebox-mode
5. M-<
6. SPC,SPC ;; space twice
7. C-aC-aC-aC-a ;; notice that the point is stuck at 6
8. C-xb<enter> ;; switch to "rebox2_bug.el
9. M-g g 1714
10. C-d ;; uncomment the hack workaround the bug
11. C-M-x ;; reevaluated the function 
12. C-x b<enter> ;; switch to "*scratch*"
13. C-aC-aC-aC-a ;; notice that the cursor switches between 1 and 6

--
Le

rebox2_bug.el
Description: Binary data