Created on 2012-02-14 15:58 by alex, last changed 2012-02-14 17:11 by arigo.
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| msg153344 - (view) | Author: Alex Gaynor (alex) *  |
Date: 2012-02-14 15:58 | |
http://paste.pocoo.org/show/550884/ will reliably segfault Python3 on all platforms (similar versions for Python2 using itertools work) |
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| msg153353 - (view) | Author: Armin Rigo (arigo) * |
Date: 2012-02-14 17:11 | |
The issue is a stack exhaustion. Examples can be trivially made for any iterator that takes another iterator as argument: itertools.takewhile(), zip() in Python3, etc. etc. It's just one of many places where CPython does a recursion without checking the recursion depth. CPython still works, based on the resonable assumption that doing such a recursion here is obscure. Someone seriously bored could start with some C-based callgraph builder; or alternatively use PyPy, which finds such recursions automatically in its own source, and compare all places where a recursion check is inserted with the corresponding place in CPython. There are a large number of them (761, not counting the JIT), so be patient :-( |
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| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2012-02-14 17:11:20 | arigo | set | nosy:
+ arigo messages: + msg153353 |
| 2012-02-14 16:20:23 | ezio.melotti | set | nosy:
+ ezio.melotti type: crash stage: needs patch |
| 2012-02-14 15:58:25 | alex | create | |