[Python-Dev] IEEE/ISO draft on Python vulnerabilities
Amaury Forgeot d'Arc
amauryfa at gmail.com
Tue Dec 13 11:37:32 CET 2011
2011/12/12 Victor Stinner <victor.stinner at haypocalc.com>
> "When sorting a list using the sort() method, attempting to inspect or
> mutate the content of the list will result in undefined behaviour."
But is this even true? in listobject.c::listsort(), since 2002,
/* The list is temporarily made empty, so that mutations performed
* by comparison functions can't affect the slice of memory we're
* sorting (allowing mutations during sorting is a core-dump
* factory, since ob_item may change).
*/
So behaviour is not undefined at all... maybe this report is only based on
note #10 of the documentation:
http://docs.python.org/library/stdtypes.html#mutable-sequence-types
and only considers python 2.2 or older...
--
Amaury Forgeot d'Arc
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