[lltx] unicode-math breakage with newest TL '10 update

[ulrik.vieth at arcor.de]

Hi all,

I can confirm that the problem goes away, if I restore the backup
of the previous version of expl3:

tlmgr restore expl3 19446

Please, somebody figure out why the update in expl3 broke
temporariy catcode changes in unicode-math.

Regards, Ulrik

----- Original Nachricht ----
Von:     ulrik.vieth at arcor.de
An:      khaledhosny at eglug.org, ulrik.vieth at arcor.de
Datum:   14.09.2010 22:15
Betreff: Aw: Re: [lltx] unicode-math breakage with newest TL '10 update

> I've traced it with logging all and it seems to be an expansion
> or catcode problem:
> 
> It happens during the processing of \um_input_math_symbol_table
> for \g_um_mathtable_tl ...n {"0220F}{\prod }{\mathop }
> 
> It ends up trying to do a \global \def ∏, which would only work
> if  ∏ is an active character or if ∏ were an unexpanded \prod.
> 
> Really messy stuff to debug.
> Regards, Ulrik
> 
> 
> ! Missing control sequence inserted.
> <inserted text> 
>                 \inaccessible 
> <to be read again> 
>                    &#8719;
> <argument> \group_end: {\global \def &#8719;
>                                         {\csname \cs_to_str:N \prod
> _sym\end...
> 
> \::: #1->#1
>            
> \um_set_big_operator:nnn ...r:N #2_sym\endcsname }
>                                                   \group_end:
> \um_set_mathch...
> 
> \g_um_mathtable_tl ...n {"0220F}{\prod }{\mathop }
>                                                   \_um_sym:nnn
> {"02210}{\cop...
> 
> \\setmathfont ...lt }\um_input_math_symbol_table: 
>                                                   \um_remap_symbols:
> \um_set...
> 
> 
> 
> ----- Original Nachricht ----
> Von:     Khaled Hosny <khaledhosny at eglug.org>
> An:      ulrik.vieth at arcor.de
> Datum:   14.09.2010 21:34
> Betreff: Re: [lltx] unicode-math breakage with newest TL '10 update
> 
> > On Tue, Sep 14, 2010 at 09:28:51PM +0200, ulrik.vieth at arcor.de wrote:
> > > I've tried manually undoing the change in luaotfload, but it didn't
> help,
> > > so I'm no longer sure about my attribution of the problem to
> luaotfload.
> > > 
> > > It could equally well be caused by some other recent updates in TL,
> > > such as fontspec, unicode-math or expl3.  Will, could you check?
> > 
> > I have hard time understanding Joel message (I still don't), but this
> > don't look like a luaotfload thing (but who am I to give statements
> > about errors involving TeX macros).
> > 
> > Regards,
> >  Khaled
> > 
> > -- 
> >  Khaled Hosny
> >  Arabic localiser and member of Arabeyes.org team
> >  Free font developer
> > 
>