On 24 mai 2006, at 10:07, Hans Hagen wrote:

> what do you get when you run that with \tracingall
>
> \tracingall
>
> Testing... ð
>
> and what does
>
> \show ð
>
> return? and what
>
> Testing... ðaaa
>
> Hans

Hi Hans,

This file:
%% eth-hans-1.tex
\starttext
what do you get when you run that with \tracingall

Testing... ð

\catcode`ð=\active \defð{^^F0}
\tracingall

Testing... ð

and what does

%\show ð

return? and what

Testing... ðaaa

Hans

\stoptext
%% end eth-hans-1.tex

typeset with XeConTeXt gives a PDF where again one has "Testing... ð"  
in the first occurence, and then "Testing... ° 0", and the process  
takes some 41 seconds...


If the above file is typeset with ConTeXt alone it stops with the  
error message:

! Missing number, treated as zero.
<to be read again>
                    ∞
l.9 \catcode`√∞
                =\active \def√∞{^^F0}
?
Process aborted

If the line \show ð is uncommented in the above file, then XeConTeXt  
stops with this error message:

[]\*12ptrmtf* and what does
@\par via @@0 b=0 p=-10000 d=100
@@1: line 1.2- t=100 -> @@0

{vertical mode: \show}
 > ð=macro:
->^^F0.
l.14 \show ð

?
Process aborted

Best regards: OK