bug#17984: 24.4.50; Error in post-command-hook (rectangle--string-preview)

[Stefan Monnier]

> emacs -Q
> Select a couple of lines.
> C-x r t
> At that moment, I see this error in the echo area:
>   Error in post-command-hook (rectangle--string-preview):
> (wrong-type-argument stringp nil)

Indeed, thanks.  I installed the patch below which should fix this
problem,


        Stefan


=== modified file 'lisp/ChangeLog'
--- lisp/ChangeLog      2014-07-16 17:06:12 +0000
+++ lisp/ChangeLog      2014-07-19 01:43:04 +0000
@@ -1,3 +1,8 @@
+2014-07-19  Stefan Monnier  <monnier@iro.umontreal.ca>
+
+       * rect.el (rectangle--string-preview): Don't assume there
+       a non-nil default (bug#17984).
+
 2014-07-16  Glenn Morris  <rgm@gnu.org>
 
        * desktop.el (after-init-hook): Disable startup frame restoration

=== modified file 'lisp/rect.el'
--- lisp/rect.el        2014-07-09 02:20:21 +0000
+++ lisp/rect.el        2014-07-19 01:41:57 +0000
@@ -396,7 +396,7 @@
     (when (equal str "")
       (setq str (or (car-safe minibuffer-default)
                     (if (stringp minibuffer-default) minibuffer-default))))
-    (setq str (propertize str 'face 'region))
+    (when str (setq str (propertize str 'face 'region)))
     (with-selected-window rectangle--string-preview-window
       (unless (or (null rectangle--string-preview-state)
                   (equal str (car rectangle--string-preview-state)))