* lisp/format.el (format-annotate-function): Handle read-only text properties

in the source.

Fixes: debbugs:14887

2 files changed, 11 insertions, 4 deletions

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index 0c5b857d374..14af1cfbda9 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,8 @@
+2013-07-27  Glenn Morris  <rgm@gnu.org>
+
+        * format.el (format-annotate-function):
+        Handle read-only text properties in the source.  (Bug#14887)
+
 2013-07-24  Glenn Morris  <rgm@gnu.org>
 
         * dired-x.el (dired-mark-extension): Convert comment to doc string.
diff --git a/lisp/format.el b/lisp/format.el
index 221eaadcdd8..fc8dcb97b01 100644
--- a/lisp/format.el
+++ b/lisp/format.el
@@ -225,10 +225,12 @@ For most purposes, consider using `format-encode-region' instead."
                 (setq selective-display sel-disp)
                 (set-buffer-multibyte multibyte)
                 (setq buffer-file-coding-system coding-system))
-              (copy-to-buffer copy-buf from to)
-              (set-buffer copy-buf)
-              (format-insert-annotations write-region-annotations-so-far from)
-              (format-encode-run-method to-fn (point-min) (point-max) orig-buf)
+              (let ((inhibit-read-only t)) ; bug#14887
+                (copy-to-buffer copy-buf from to)
+                (set-buffer copy-buf)
+                (format-insert-annotations write-region-annotations-so-far from)
+                (format-encode-run-method to-fn (point-min) (point-max)
+                                          orig-buf))
               (when (buffer-live-p copy-buf)
                 (with-current-buffer copy-buf
                   ;; Set write-region-post-annotation-function to