AsyncioEventLoopTest failure

[lfam]

I'm trying to build urwid-1.3.0 with python-3.4.3 on x86_64, but it fails while testing Python's asyncio features.

There is a full build log available from this page:
http://hydra.gnu.org/build/861615

I reproduced the error with urwid-1.3.1.

It fails during testing, specifically like this:

======================================================================
ERROR: test_remove_watch_file (urwid.tests.test_event_loops.AsyncioEventLoopTest)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/gnu/store/13n8xbi9wv9pigfyhir007qadr81jq46-python-3.4.3/lib/python3.4/asyncio/selector_events.py", line 234, in add_reader
    key = self._selector.get_key(fd)
  File "/gnu/store/13n8xbi9wv9pigfyhir007qadr81jq46-python-3.4.3/lib/python3.4/selectors.py", line 182, in get_key
    raise KeyError("{!r} is not registered".format(fileobj)) from None
KeyError: '5 is not registered'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/gnu/tmp/nix-build-python-urwid-1.3.0.drv-0/urwid-1.3.0/build/lib.linux-x86_64-3.4/urwid/tests/test_event_loops.py", line 33, in test_remove_watch_file
    handle = evl.watch_file(5, lambda: None)
  File "/gnu/tmp/nix-build-python-urwid-1.3.0.drv-0/urwid-1.3.0/build/lib.linux-x86_64-3.4/urwid/main_loop.py", line 1263, in watch_file
    self._loop.add_reader(fd, callback)
  File "/gnu/store/13n8xbi9wv9pigfyhir007qadr81jq46-python-3.4.3/lib/python3.4/asyncio/selector_events.py", line 237, in add_reader
    (handle, None))
  File "/gnu/store/13n8xbi9wv9pigfyhir007qadr81jq46-python-3.4.3/lib/python3.4/selectors.py", line 402, in register
    self._epoll.register(key.fd, epoll_events)
PermissionError: [Errno 1] Operation not permitted

----------------------------------------------------------------------
Ran 284 tests in 0.399s

FAILED (errors=1)

[lgbaldoni]

Same here.