@@ -9,6 +9,9 @@ What's New in Stackless 3.X.X?
 
 *Release date: 20XX-XX-XX*
 
+- https://github.com/stackless-dev/stackless/issues/204
+  Fix bpo-24596 for Stackless too.
+
 - https://github.com/stackless-dev/stackless/issues/200
   Fix a bug in the C-API functions PyTasklet_Run_nr() and
   PyTasklet_Switch_nr(). Under exotic conditions the functions could
 
@@ -1427,12 +1427,12 @@ slp_tasklet_end(PyObject *retval)
      */
     if (retval == NULL) {
         int handled = 0;
-        if (PyErr_ExceptionMatches(PyExc_SystemExit)) {
+        if (!ismain && PyErr_ExceptionMatches(PyExc_SystemExit)) {
             /* but if it is truly a SystemExit on the main thread, we want the exit! */
             if (ts == slp_initial_tstate && !PyErr_ExceptionMatches(PyExc_TaskletExit)) {
                 PyStackless_HandleSystemExit();
                 handled = 1; /* handler returned, it wants us to silence it */
-            } else if (!ismain) {
+            } else {
                 /* deal with TaskletExit on a non-main tasklet */
                 handled = 1;
             }