[issue5765] stack overflow evaluating eval("()" * 30000)

[Amaury Forgeot d'Arc]

Amaury Forgeot d'Arc added the comment:

The patch is incomplete: the VISIT macro contains a "return 0;" and in this case st->recursion_depth is not decremented.
OTOH errors are never caught, so it's not necessary to do any cleanup in case of errors.
Here is a simplified patch.

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<http://bugs.python.org/issue5765>
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