[Python-Dev] IEEE/ISO draft on Python vulnerabilities (original) (raw)

Amaury Forgeot d'Arc amauryfa at gmail.com
Tue Dec 13 11:37:32 CET 2011

"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...

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