* lisp/emacs-lisp/gv.el (gv-ref): Mention lexbind restriction.

Fixes: debbugs:16153

2 files changed, 10 insertions, 3 deletions

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index 9ccc510ce1a..6b0b8fc67d8 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,7 @@
+2013-12-16  Stefan Monnier  <monnier@iro.umontreal.ca>
+
+        * emacs-lisp/gv.el (gv-ref): Mention lexbind restriction (bug#16153).
+
 2013-12-16  Teodor Zlatanov  <tzz@lifelogs.com>
 
         * progmodes/cfengine.el (cfengine3--current-word): Remove.
@@ -9,8 +13,8 @@
 
 2013-12-16  Martin Rudalics  <rudalics@gmx.at>
 
-        * window.el (display-buffer-below-selected): Bind
-        split-height-threshold to 0 as suggested by Juri Linkov.
+        * window.el (display-buffer-below-selected):
+        Bind split-height-threshold to 0 as suggested by Juri Linkov.
 
 2013-12-16  Leo Liu  <sdl.web@gmail.com>
 
diff --git a/lisp/emacs-lisp/gv.el b/lisp/emacs-lisp/gv.el
index 1a3800597a6..47ab36c0531 100644
--- a/lisp/emacs-lisp/gv.el
+++ b/lisp/emacs-lisp/gv.el
@@ -454,7 +454,10 @@ The return value is the last VAL in the list.
 ;;;###autoload
 (defmacro gv-ref (place)
   "Return a reference to PLACE.
-This is like the `&' operator of the C language."
+This is like the `&' operator of the C language.
+Note: this only works reliably with lexical binding mode, except for very
+simple PLACEs such as (function-symbol 'foo) which will also work in dynamic
+binding mode."
   (gv-letplace (getter setter) place
     `(cons (lambda () ,getter)
            (lambda (gv--val) ,(funcall setter 'gv--val)))))