New submission from Jon Heiner: I believe there is an issue with the _struct.c handling of Pascal style strings.
In the _struct.c:s_unpack_internal() function (reading 2.7.6 and 2.7.9 source from tgz ball), the size parameter 'n' is clamped to code->size-1. As far as I can tell, 'n' is set to the correct deserialized value, but the code->size value is not set to 255. I could be incorrect, as I'm not running in a debugger. I've attached a short repro case. Note the use of unpack_from() as otherwise unpac() will thrown an error. Additionally, I may be using it wrong, but this feels correct. ---------- components: Library (Lib) files: unpack_pascal.py messages: 239644 nosy: jonheiner, mark.dickinson, meador.inge priority: normal severity: normal status: open title: struct.unpack returns null pascal strings - [first] bug report versions: Python 2.7 Added file: http://bugs.python.org/file38745/unpack_pascal.py _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue23816> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
