/test/test_readv.py fails to run on Ubuntu and FreeBSD

[coder03]

chatty@ubuntu:~shrapnel/test$ python test_readv.py
E

ERROR: test_readv (main.Test)
Test readv.

Traceback (most recent call last):
File "test_readv.py", line 113, in test_readv
'01234567'))
File "test_readv.py", line 77, in testit
blocks = coro.with_timeout(5, s.readv, block_receives)
File "coro/_coro.pyx", line 1111, in coro._coro.sched.with_timeout (coro/_coro.c:16399)
TypeError: Argument 'size_list' has incorrect type (expected list, got tuple)

---

Ran 1 test in 0.001s

FAILED (errors=1)
7: Tue Dec 6 22:26:19 2016 thread 7 (<bound method TestSession.run of <main.TestSession instance at 0x7f1f252603f8>>): error '('coro/oserrors.pyx coro.oserrors.map_exception (coro/oserrors.c:874)|44', "<class 'coro.oserrors.EPIPE'>", '[Errno 32] Broken pipe', '[coro/_coro.pyx coro._coro._wrap1 (coro/_coro.c:12115)|772] [test_readv.py run|63] [coro/socket.pyx coro._coro.sock.send (coro/_coro.c:27626)|282] [coro/socket.pyx coro._coro.sock.send (coro/_coro.c:27500)|314] [coro/pyrex_helpers.pyx coro._coro.raise_oserror (coro/_coro.c:3879)|32] [coro/oserrors.pyx coro.oserrors.map_exception (coro/oserrors.c:874)|44]')'
chatty@ubuntu:~shrapnel/test$

[samrushing]

I tried changing the test to pass lists instead of tuples, that was not enough. Now it's complaining that 'tuple' object does not support item assignment on socket.pyx::559.

Looks like this kinda thing no longer works:

x = PyTuple_New(1)
x[0] = 1

The code either needs to use PyTuple_SetItem (or something with a name similar to that), or needs to be rewritten in a simpler style that plays better with today's smarter Cython.