[XeTeX] xelatex math problem with sqrt

[L J Davies]

When I ran the two code examples I was able to compile them without setting
trace options. I have just run the code through XeLateX again but using the
xelatex without any options in a command window to be absolutely sure that
the options I normally use were not affecting the results. The two code
samples compiled correctly for me again.

I usually use TeXmaker and set my XeTeX/XeLaTeX options in that application,
so the command line compilation is essentially using a vanilla installation
of MiKTeX.

Kind regards,

Lars



-----Original Message-----


Am Thu, 29 May 2008 16:54:45 +0100 schrieb Jonathan Kew:

>> I made some tests. As far as I can see the problem disappear when I
>> set enough trace-options. It doesn't matter what options I set as
>> long as I set enough. So I think there is a timing problem.
> 
> That's really strange; I can't imagine how timing could be important. 

The bug is triggered by the code $\sqrt{x^1_2}$ (I put some pages before
and I can see that they are typeset without problems). 

It is also important that there is a super- and a subscript in one
\sqrt. It works fine if use e.g. \sqrt{x^1}\sqrt{y_2}. 

I don't have a problem on another (faster) pc.

The error message is:

Die Anweisung in "<long number" verweist auf Speicher in "<another
number>". Der Vorgang "read" konnte nicht auf dem Speicher durchgeführt
werden. 

This sounds as if xetex can not read something. 

I tried also some other math packages:
mathptmx, mathpazo, fourier, mnsymbol works fine. euler and cmbright
crash too. 


> Perhaps more likely there's some kind of memory allocation/ 
> overwriting issue, and when you start changing trace options you  
> influence how the allocations and access happens.

I tried with various combinations of trace options. It can crash with
everyone, it only stopped when I used enough. 
 


-- 
Ulrike Fischer 

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