homepage

kqueue doesn't support character devices like PTY before Mac OS 10.9. This issue is discussion on Tulip mailing list, no decision was taken yet how to fix this issue.
http://buildbot.python.org/all/builders/AMD64%20Snow%20Leop%203.x/builds/1071/steps/test/logs/stdio
======================================================================
ERROR: test_read_pty_output (test.test_asyncio.test_events.KqueueEventLoopTests)
----------------------------------------------------------------------
Traceback (most recent call last):
 File "/Users/buildbot/buildarea/3.x.murray-snowleopard/build/Lib/asyncio/selector_events.py", line 135, in add_reader
 key = self._selector.get_key(fd)
 File "/Users/buildbot/buildarea/3.x.murray-snowleopard/build/Lib/selectors.py", line 181, in get_key
 raise KeyError("{!r} is not registered".format(fileobj)) from None
KeyError: '7 is not registered'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
 File "/Users/buildbot/buildarea/3.x.murray-snowleopard/build/Lib/test/test_asyncio/test_events.py", line 980, in test_read_pty_output
 self.loop.run_until_complete(connect())
 File "/Users/buildbot/buildarea/3.x.murray-snowleopard/build/Lib/asyncio/base_events.py", line 177, in run_until_complete
 return future.result()
 File "/Users/buildbot/buildarea/3.x.murray-snowleopard/build/Lib/asyncio/futures.py", line 236, in result
 raise self._exception
 File "/Users/buildbot/buildarea/3.x.murray-snowleopard/build/Lib/asyncio/tasks.py", line 281, in _step
 result = next(coro)
 File "/Users/buildbot/buildarea/3.x.murray-snowleopard/build/Lib/test/test_asyncio/test_events.py", line 974, in connect
 master_read_obj)
 File "/Users/buildbot/buildarea/3.x.murray-snowleopard/build/Lib/asyncio/base_events.py", line 537, in connect_read_pipe
 transport = self._make_read_pipe_transport(pipe, protocol, waiter)
 File "/Users/buildbot/buildarea/3.x.murray-snowleopard/build/Lib/asyncio/unix_events.py", line 149, in _make_read_pipe_transport
 return _UnixReadPipeTransport(self, pipe, protocol, waiter, extra)
 File "/Users/buildbot/buildarea/3.x.murray-snowleopard/build/Lib/asyncio/unix_events.py", line 200, in __init__
 self._loop.add_reader(self._fileno, self._read_ready)
 File "/Users/buildbot/buildarea/3.x.murray-snowleopard/build/Lib/asyncio/selector_events.py", line 138, in add_reader
 (handle, None))
 File "/Users/buildbot/buildarea/3.x.murray-snowleopard/build/Lib/selectors.py", line 462, in register
 self._kqueue.control([kev], 0, 0)
OSError: [Errno 22] Invalid argument

The issue was discussed here:
https://groups.google.com/d/msg/python-tulip/I8oJ65Ww2Zw/tVL2ppXiU54J
The decision is to skip the test on Mac OS X < 10.9.

New changeset 424564cffad0 by Victor Stinner in branch 'default':
Close #20365: Skip test_asyncio.test_events.test_read_pty_output() on Mac OS X
http://hg.python.org/cpython/rev/424564cffad0