On 10/08/13 20:16, Bram Moolenaar wrote:
Ken Takata wrote:
Hi Bram,
2013/08/10 Sat 19:45:27 UTC+9 Bram Moolenaar wrote:
That's tricky. How did you find it? If I'm not mistaken this only
happens once in 2^20 seconds...
With my eyes ;-)
When I checking is there any function which doesn't use Unicode APIs,
I found that this function uses GetTickCount(). I know that there was
a famous 49.7 days bug on Win9x related to this API. So I checked this
function closely and found it.
So we would have to write a test and run it for 50 days to check that
the bug is fixed :-).
And run it without the fix to verify the test fails then. Fortunately
they can run in parallel.
Be sure to disable automatic updates, otherwise the system will reboot
within 50 days.
Actually, if I'm not mistaken, checked debug builds of Windows have
a registry setting where it sets the boot-time value of GetTickCount()
such that it wraps round 30-seconds after reboot, just for testing such
a situation...
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