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Issue #12791: Break reference cycles early when a generator exits with an exception.

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This commit is contained in:
Antoine Pitrou 2011-08-20 14:18:25 +02:00
commit 8fd544ffa9
3 changed files with 76 additions and 0 deletions
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11
Objects/genobject.c
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@ -100,6 +100,17 @@ gen_send_ex(PyGenObject *gen, PyObject *arg, int exc)
if (!result || f->f_stacktop == NULL) {
/* generator can't be rerun, so release the frame */
/* first clean reference cycle through stored exception traceback */
PyObject *t, *v, *tb;
t = f->f_exc_type;
v = f->f_exc_value;
tb = f->f_exc_traceback;
f->f_exc_type = NULL;
f->f_exc_value = NULL;
f->f_exc_traceback = NULL;
Py_XDECREF(t);
Py_XDECREF(v);
Py_XDECREF(tb);
Py_DECREF(f);
gen->gi_frame = NULL;
}