1 files changed, 17 insertions, 7 deletions

diff --git a/src/textprop.c b/src/textprop.c
index 379eafb73f7..1ce44ad60ac 100644
--- a/src/textprop.c
+++ b/src/textprop.c
@@ -85,8 +85,18 @@ text_read_only (Lisp_Object propval)
   xsignal0 (Qtext_read_only);
 }
 
+/* Prepare to modify the region of BUFFER from START to END.  */
+
+static void
+modify_region (Lisp_Object buffer, Lisp_Object start, Lisp_Object end)
+{
+  struct buffer *buf = XBUFFER (buffer), *old = current_buffer;
+
+  set_buffer_internal (buf);
+  modify_region_1 (XINT (start), XINT (end), true);
+  set_buffer_internal (old);
+}
 
-
 /* Extract the interval at the position pointed to by BEGIN from
    OBJECT, a string or buffer.  Additionally, check that the positions
    pointed to by BEGIN and END are within the bounds of OBJECT, and
@@ -1164,7 +1174,7 @@ Return t if any property value actually changed, nil otherwise.  */)
     }
 
   if (BUFFERP (object))
-    modify_region (XBUFFER (object), XINT (start), XINT (end), 1);
+    modify_region (object, start, end);
 
   /* We are at the beginning of interval I, with LEN chars to scan.  */
   for (;;)
@@ -1302,7 +1312,7 @@ set_text_properties (Lisp_Object start, Lisp_Object end, Lisp_Object properties,
     }
 
   if (BUFFERP (object) && !NILP (coherent_change_p))
-    modify_region (XBUFFER (object), XINT (start), XINT (end), 1);
+    modify_region (object, start, end);
 
   set_text_properties_1 (start, end, properties, object, i);
 
@@ -1451,7 +1461,7 @@ Use `set-text-properties' if you want to remove all text properties.  */)
     }
 
   if (BUFFERP (object))
-    modify_region (XBUFFER (object), XINT (start), XINT (end), 1);
+    modify_region (object, start, end);
 
   /* We are at the beginning of an interval, with len to scan */
   for (;;)
@@ -1565,7 +1575,7 @@ Return t if any property was actually removed, nil otherwise.  */)
           else if (LENGTH (i) == len)
             {
               if (!modified && BUFFERP (object))
-                modify_region (XBUFFER (object), XINT (start), XINT (end), 1);
+                modify_region (object, start, end);
               remove_properties (Qnil, properties, i, object);
               if (BUFFERP (object))
                 signal_after_change (XINT (start), XINT (end) - XINT (start),
@@ -1578,7 +1588,7 @@ Return t if any property was actually removed, nil otherwise.  */)
               i = split_interval_left (i, len);
               copy_properties (unchanged, i);
               if (!modified && BUFFERP (object))
-                modify_region (XBUFFER (object), XINT (start), XINT (end), 1);
+                modify_region (object, start, end);
               remove_properties (Qnil, properties, i, object);
               if (BUFFERP (object))
                 signal_after_change (XINT (start), XINT (end) - XINT (start),
@@ -1589,7 +1599,7 @@ Return t if any property was actually removed, nil otherwise.  */)
       if (interval_has_some_properties_list (properties, i))
         {
           if (!modified && BUFFERP (object))
-            modify_region (XBUFFER (object), XINT (start), XINT (end), 1);
+            modify_region (object, start, end);
           remove_properties (Qnil, properties, i, object);
           modified = 1;
         }