New submission from Anselm Kruis: If you store a reference to a frame from a dead thread and then access frame.f_restricted python eventually crashed.
I didn't investigate this bug in depth. Here is my preliminary explanation. The access of frame.f_restricted causes a call of PyFrame_IsRestricted(f). PyFrame_IsRestricted is a macro and expands to ((f)->f_builtins != (f)->f_tstate->interp->builtins) Now, if the thread that created f is already dead, the f_tstate points to an invalid structure. Depending on the content of the memory the access of f_tstate->interp causes an access violation. I use a Win32 debug build to reliable reproduce the issue. ---------- components: Interpreter Core files: crash_on_f_restricted.py messages: 222852 nosy: anselm.kruis priority: normal severity: normal status: open title: Interpreter crash upon accessing frame.f_restricted of a frame from a dead thread type: crash versions: Python 2.7 Added file: http://bugs.python.org/file35931/crash_on_f_restricted.py _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue21967> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
