Stackless issue python#81: don't raise TaskletExit in daemon threads …

…during shutdown

Since issue python#81 Stackless 2.7 raises TaskletExit in daemon threads during interpreter shutdown.
This prevents later crashes (i.e. segfaults). In Python 3 this precautions are no longer required
and break the CPython test case test.test_threading.ThreadJoinOnShutdown.test_6_daemon_threads.
This changeset removes the code, that raises TaskletExit.

Stackless/changelog.txt

@@ -34,9 +34,8 @@ What's New in Stackless 3.X.X?
 - https://bitbucket.org/stackless-dev/stackless/issues/81
   Fix (crash) bugs during thread and interpreter shutdown.
   If a thread dies, Stackless now really kills tasklets with C-state. During
-  interpreter shutdown, Stackless also kills daemon threads, if they execute
-  Python code or switch tasklets. This change avoids crashes during a later
-  shutdown stage.
+  interpreter shutdown, Stackless also kills daemon threads, if they switch
+  tasklets. This change avoids crashes during a later shutdown stage.
 
 - https://bitbucket.org/stackless-dev/stackless/issues/92
   If you run Stackless with the option '-v' (or set the environment variable

Stackless/core/stacklesseval.c

@@ -516,9 +516,6 @@ void slp_kill_tasks_with_stacks(PyThreadState *target_ts)
                      */
                     count++;
                     kill_pending_current_main_and_watchdogs(ts);
-                    /* It helps to inactivate threads reliably */
-                    if (PyExc_TaskletExit)
-                        PyThreadState_SetAsyncExc(ts->thread_id, PyExc_TaskletExit);
                 }
             }
             /* We must not release the GIL while we might hold the HEAD-lock.