sage-support

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[sage-support] Bug in sage.symbolic.expression.Expression.__init__ (sage.4.0.2) Nicolas Fri Jun 26 07:00:29 2009

I think there is definitely a bug in the __init__ method of the
Expression class.
Probably it has not been tracked down because this method is quasi
never used in the new version of symbolics. However, it raises
problems when one wants to derive a suclass from Expression.

The bug is described in details here for the 4.0.1 version. It is
still present in the 4.0.2 :

http://groups.google.com/group/sage-support/browse_thread/thread/d50dc3bc2bdbeab0/34798c0585fc034f?lnk=gst&q=nicolas#34798c0585fc034f

Burcin provided a simple solution that works wonderfully, in the same
thread.

Should we issue a ticket for this to be included in the future
versions ?

Thanks to all

Nicolas

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