[issue20452] test_timeout_rounding() of test_asyncio fails on "x86 Ubuntu Shared 3.x" buildbot

[STINNER Victor]

STINNER Victor added the comment:

_run_once() can be called more than expected if selector.select() was interrupted by a signal or because the granularity is wrong. If we want to avoid that, a simple fix is just to loop again in this case. Attached patch implements that (I wrote it for Tulip, it cannot applied cleanly on Python because I added debug code to investigate this issue).

The patch should also fix the sporadic issue of signal interrupting _run_once(). The unit test should not be interrupted by a signal, but it can occur on a real application. For example when your resize a terminal.

----------
keywords: +patch
Added file: http://bugs.python.org/file33821/loop_run_once.patch

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue20452>
_______________________________________