Serhiy Storchaka added the comment: Thank you for your report Artem.
But Modules/clinic/_struct.c.h is generated file, it shouldn't be manually edited. And clearing the cache doesn't solves the bug. If _PyArg_ParseStack() failed it calls cache_struct_converter() for clearing s_object and jumps to the end of the function where s_object is decrefed second time. Yet one reference is left in the cache, but this is a hanging reference to deallocated object. Next call of struct.unpack() can retrieve that hanging reference and use it. PR 1213 properly fixes this issue. It also fixes similar bug PyUnicode_FSDecoder(), but the latter is hardly reproducible since in the stdlib PyUnicode_FSDecoder() is used mostly for the last argument of a function. ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue29802> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
