Pickling of exhausted generator objects fails

Originally reported by: Anselm Kruis (Bitbucket: akruis, GitHub: akruis)

---

If you pickle an exhausted generator you get a SystemError (2.7-slp) or an access violation (3.x). The cause for this bug is obvious: generator->gi_frame is NULL and pricklepit.c gen_reduce() does not handle this situation.

The fix is simple: change gen_reduce() to return Py_None, if generator->gi_frame is NULL. change gen_setstate() to set gen->gi_frame to NULL, if the frame is Py_None.

---

• Bitbucket: https://bitbucket.org/stackless-dev/stackless/issue/130

Original comment by Anselm Kruis (Bitbucket: akruis, GitHub: akruis):

---

Fixed in changeset:

• 2.7-slp: b86bda31f4e3
• 3.3-slp: 524e60faeb5c
• 3.4-slp: e97487c7c482
• 3.5-slp: 897d37941044

Not yet merged to default-slp