Benjamin Peterson <benja...@python.org> added the comment:

2011/2/3 Alexander Belopolsky <rep...@bugs.python.org>:
>
> Alexander Belopolsky <belopol...@users.sourceforge.net> added the comment:
>
> Looks like a stack overflow caused by an infinite recursion.  I am not sure 
> if it is possible to add cycle detection code without sacrificing performance 
> or setting some arbitrary limits.

Yes, it's definitely low priority. It's probably easier to crash the
interpreter by producing differently malformed ast anyway.

>
> I wonder: Why ast nodes need to be mutable?

So people can change them.

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue11105>
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