[tex-live] e-TeX register sparse array bug

[Hans Hagen]

Olaf Weber wrote:

>Through the Debian people I found out about a bug in e-TeX's handling
>of registers.
>  
>
I don't have that problem here so maybe the problem is in the \[ macro. 
Is there a difference when you run:

\bgroup \[aa\] \egroup

(maybe \bgroup \tracingall \[aa\] \egroup provides a clue)

>$ cat etex-bug.tex
>\documentclass{article}
>\usepackage{amsmath}
>\begin{document}
>\makeatletter
>\dimendef\z@=256\relax
>\z@=0pt\relax
>\[aa\]
>\show\z@
>\end{document}
>$ latex etex-bug.tex
>This is pdfeTeX, Version 3.141592-1.20a-rc7.1-2.1 (Web2C 7.5.3)
>  
>
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