Re: text-property/intervals question

[Richard Stallman]

    --- intervals.c.~1.109.~    Mon Nov 12 20:06:41 2001
    +++ intervals.c     Sun Nov 25 21:15:13 2001
    @@ -1690,7 +1690,7 @@
       if (NULL_INTERVAL_P (source))
         {
           Lisp_Object buf;
    -      if (!inherit && ! NULL_INTERVAL_P (tree))
    +      if (!inherit && !NULL_INTERVAL_P (tree) && length > 0)
            {
              XSETBUFFER (buf, buffer);
              set_text_properties_1 (make_number (position),

Yes, it looks like this code could have created a zero-length interval
when there wasn't already one.

I will change set_text_properties_1 so it is safe in strange situations.