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Created on 2017-06-22 12:43 by george-shuklin, last changed 2022-04-11 14:58 by admin. This issue is now closed.
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| File name | Uploaded | Description | Edit | |
| bad_python.py.gz | george-shuklin, 2017-06-22 12:43 | Example of code to crash python2 interpretator | ||
| Messages (6) | |||
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| msg296626 - (view) | Author: George Shuklin (george-shuklin) | Date: 2017-06-22 12:43 | |
If there is too many indexes python crashes: a[0][0][0][0].... segfault at 7ffd25fe6ff8 ip 0000564528c8cfe6 sp 00007ffd25fe7000 error 6 in python2.7[564528b6a000+324000] code to generate code: >>> i="[0]"*200000 >>> file('/tmp/bad_python.py','w').write('a=[]\na.append(a)\nprint(type(a'+i+'))\n') python2 /tmp/bad_python.py Segmentation fault (core dumped) python3 /tmp/bad_python.py RecursionError: maximum recursion depth exceeded during compilation Just in case I upload generated code. This bug affects both eval() function and python interpreter. |
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| msg296731 - (view) | Author: Terry J. Reedy (terry.reedy) *  |
Date: 2017-06-23 17:51 | |
To be clear, as the title and version suggest, the bug is the 2.7 segfault versus the 3.x exception during compile. It is normal for the compiler to have limits and to exit when they are exceeded. I have no idea if the 3.x code can be backported. I added ast/compiler experts to the nosy list. |
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| msg296830 - (view) | Author: Mark Dickinson (mark.dickinson) * |
Date: 2017-06-25 17:03 | |
Looks like a duplicate of http://bugs.python.org/issue7985 |
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| msg296831 - (view) | Author: Serhiy Storchaka (serhiy.storchaka) * |
Date: 2017-06-25 17:56 | |
Which is a duplicate of issue5765 fixed for Python 3.3+. It was decided to not fix issue5765 for 2.7. |
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| msg296833 - (view) | Author: George Shuklin (george-shuklin) | Date: 2017-06-25 17:59 | |
Unfixed crash of code interpreter? This is sad. |
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| msg296842 - (view) | Author: Nick Coghlan (ncoghlan) * |
Date: 2017-06-26 03:49 | |
We have quite a few of them: https://github.com/python/cpython/tree/master/Lib/test/crashers Python 2.7 is ancient, so our tolerance for intrusive interpreter level fixes to address rare problems that are easy to avoid at the development level is pretty low. Fixing those kinds of problems in Python 3.x is encouraged, but still not necessarily easy. |
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| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2022-04-11 14:58:48 | admin | set | github: 74919 |
| 2017-06-26 03:49:19 | ncoghlan | set | messages: + msg296842 |
| 2017-06-25 17:59:59 | george-shuklin | set | messages: + msg296833 |
| 2017-06-25 17:56:38 | serhiy.storchaka | set | status: open -> closed superseder: stack overflow evaluating eval("()" * 30000) nosy: + serhiy.storchaka messages: + msg296831 resolution: duplicate stage: resolved |
| 2017-06-25 17:03:54 | mark.dickinson | set | nosy:
+ mark.dickinson messages: + msg296830 |
| 2017-06-23 17:51:30 | terry.reedy | set | nosy:
+ terry.reedy, brett.cannon, ncoghlan, yselivanov, benjamin.peterson messages: + msg296731 |
| 2017-06-22 12:43:13 | george-shuklin | create | |