STINNER Victor <victor.stin...@haypocalc.com> added the comment: > The main thread was waiting test_signals() lock (signalled_all) > while it is was interrupted by a signal. The signal handler calls > Py_AddPendingCall() which blocks on acquiring "pending_lock".
Oh, the main thread receives SIGUSR1: the signal handler calls Py_AddPendingCall() to process it later. But while calling Py_AddPendingCall(), it receives a SIGUSR2: the same signal handler is called, and it calls Py_AddPendingCall(). And we have a deadlock because we try to acquire the lock twice, or try to acquire the lock before the lock was released. ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue11768> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
