[Emacs-diffs] Changes to emacs/src/textprop.c

[Stefan Monnier]

Index: emacs/src/textprop.c
diff -u emacs/src/textprop.c:1.120 emacs/src/textprop.c:1.121
--- emacs/src/textprop.c:1.120  Fri Nov 23 03:07:24 2001
+++ emacs/src/textprop.c        Sun Nov 25 21:19:38 2001
@@ -1303,7 +1303,8 @@
    properties PROPERTIES.  BUFFER is the buffer containing
    the text.  This does not obey any hooks.
    You can provide the interval that START is located in as I,
-   or pass NULL for I and this function will find it.  */
+   or pass NULL for I and this function will find it.
+   This function assumes that START < END.  */
 
 void
 set_text_properties_1 (start, end, properties, buffer, i)
@@ -1316,6 +1317,7 @@
 
   s = XINT (start);
   len = XINT (end) - s;
+  eassert (len > 0);
   if (i == 0)
     i = find_interval (BUF_INTERVALS (XBUFFER (buffer)), s);