I have been getting this quite a few times now in 21.2-b38 on native
NT, usually while working in ediff.
I'll have to build a debug version again, unless somebody knows
already what this is:
Typed by hand:
Fatal error: assertion failed, file d:\tmp\21.2\xemacs\nt\..\src\event-msw.c, line 1489,
(!badly_p && active == WAIT_TIMEOUT) || (active >= WAIT_OBJECT_0 &&
active <= WAIT_OBJECT_0 + mswindows_waitable_count)