New submission from Serhiy Storchaka <[email protected]>:
Python 2 can crash when compile long expression.
>>> x = eval('""' + '+chr(33)'*100000)
Segmentation fault (core dumped)
This was fixed in Python 3. RecursionError is raised now.
>>> x = eval('""' + '+chr(33)'*100000)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
RecursionError: maximum recursion depth exceeded during compilation
>>> x = eval('+chr(33)'*1000000)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
RecursionError: maximum recursion depth exceeded during compilation
But compiling to AST still can crash.
>>> import ast
>>> x = ast.parse('+chr(33)'*1000000)
Segmentation fault (core dumped)
----------
components: Interpreter Core
messages: 311568
nosy: benjamin.peterson, brett.cannon, ncoghlan, serhiy.storchaka, yselivanov
priority: normal
severity: normal
status: open
title: Stack overflow when parse long expression to AST
type: crash
versions: Python 3.6, Python 3.7, Python 3.8
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Python tracker <[email protected]>
<https://bugs.python.org/issue32758>
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