New submission from Dave Reid <seabass...@gmail.com>: A particular combination of seed and jumpahead calls seems to force the MT generator into a state where it produces a random variate that is outside the range 0-1. Problem looks like it might be in _randommodule.c:genrand_int32, which produces a value > 0xffffffff for the given state, but I don't understand the generator well enough to debug any further.
The attached test case produces 1.58809998297 as the 2nd variate in Python 2.7 and 1.35540900431 as the 23rd variate in Python 2.7.3. The problem occurs on both Linux (CentOS 6) and Mac OSX (10.6.8), both 64-bit. ---------- components: Interpreter Core files: badrand.py messages: 158406 nosy: Dave.Reid priority: normal severity: normal status: open title: Value returned by random.random() out of valid range type: behavior versions: Python 2.7 Added file: http://bugs.python.org/file25235/badrand.py _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue14591> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
