Re: Can't display help-echo in overlay string with composition.

[YAMAMOTO Mitsuharu]

>>>>> On Wed, 31 May 2006 12:13:52 +0900 (JST), YAMAMOTO Mitsuharu 
>>>>> <address@hidden> said:

> "Arg out of range 0,0" repeatedly occurs when trying to display
> help-echo string in an overlay string with composition.

>  1. emacs -Q -D
>  2. (overlay-put (make-overlay 1 1) 'before-string
>                  (propertize (compose-string "ab") 'help-echo "ab"))
>  3. Move the mouse pointer to the beginning of buffer.

The following change seems to work for me.  Could someone check if
this is correct?

                                     YAMAMOTO Mitsuharu
                                address@hidden

Index: src/xdisp.c
===================================================================
RCS file: /cvsroot/emacs/emacs/src/xdisp.c,v
retrieving revision 1.1101
diff -c -r1.1101 xdisp.c
*** src/xdisp.c 28 May 2006 20:19:07 -0000      1.1101
--- src/xdisp.c 2 Jun 2006 08:00:17 -0000
***************
*** 6238,6243 ****
--- 6238,6245 ----
    it->position = (STRINGP (it->string)
                  ? it->current.string_pos
                  : it->current.pos);
+   if (STRINGP (it->string))
+     it->object = it->string;
    return 1;
  }