string-match in unicode-2 (Re: Calc broken in Emacs unicode-2 branch)

[Jay Belanger <belanger@truman.edu>]

Kenichi Handa <handa@m17n.org> writes:
..
> I'm sorry for the late response.

And I'm sorry for mine.  (I responded to Leo offlist, but I should
have done it on the list.)

> Jay, it seems that you are the maintainer of this package.
> Could you please work on it with emacs-unicode-2 branch?

Yes.  The error seems related to this:
  (string-match "⁸" "x")
(The first string is a superscript "8".)  
It returns nil in the normal cvs emacs, but 0 in the unicode-2
branch.  I don't know why it doesn't return nil in the unicode-2
branch; perhaps someone can enlighten me.
For what it's worth, C-x= on the characters returns
in cvs
Char: ⁸ (342520, #o1234770, #x539f8, file ...) point=17 of 24 (67%) column=15
Char: x (120, #o170, #x78) point=21 of 24 (83%) column=19
in unicode-2
Char: ⁸ (8312, #o20170, #x2078, file ...) point=17 of 24 (67%) column=15
Char: x (120, #o170, #x78) point=21 of 24 (83%) column=19

Jay