[XeTeX] Why I do get nonsense characters when I use unicode characters inside \message with XeTeX?

[Arthur Reutenauer]

  Thanks, it confirms what I suspected (I tried to compile your TeX file
but didn't get the same result; the xepersian version was too old on the
computer I was using then, I guess).  XeTeX really seems to take bytes
in account when printing messages to the log file and terminal; not
characters.  This leads to the problem you experienced.

	Arthur