New submission from Mark Dickinson <dicki...@gmail.com>: _PyFloat_Pack4 does a double-to-float cast, without first checking that the value being converted is within the range of a float. According to C99 6.3.1.5p2, this results in undefined behaviour. It should be fixed (probably via comparison with FLT_MAX before casting.)
np_float in the struct module also has this problem. ---------- assignee: mark.dickinson messages: 109483 nosy: mark.dickinson priority: normal severity: normal stage: needs patch status: open title: Undefined behaviour in _PyFloat_Pack4 type: behavior versions: Python 2.6, Python 2.7, Python 3.1, Python 3.2 _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue9190> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
