New submission from Roger Taylor :
An IntFlag member before 3.8.6 was converted to an integer in an f-string.
After 3.8.6, the textual IntFlag class and member name are placed in the
interpolated f-string instead of the integer.
3.8.3: f"... {X.F} ..." where X.F = 1 << 4 w
New submission from Roger Taylor :
The following problem only occurs when I use ProactorEventLoop. If I use
'asyncio.get_event_loop()' it exits normally, rather than infinite looping in
IOCP land.
1. I run the attached 'bug.py' script in a DOS window. It is a slightly
