Terry J. Reedy added the comment:
In searching for an existing issue about this, there seemed to be other
edge-case stdin problems. I don't think that they were all usage errors. This
problem was revealed by an accidental usage error that should have lain dormant
until an exception was raised
R. David Murray added the comment:
Indeed, in both 3.3.0 non-debug and 3.4 tip debug, python starts consuming 100%
of the CPU. I'm guessing there is some subtlety involving the new IO system
involved here.
Python 2.7 debug build acts as you indicate for your 2.7 non-debug build.
All my tests
New submission from Terry J. Reedy:
This appears to be Python 3 specific. On 2.7.4 (Win7):
>>> import sys
>>> sys.stdin='abd'
>>>
With fresh 3.4 repository debug build, prompt never appears, ^C, ^D are
ignored. Must close with window's [X] button. With fresh 3.3, get repeated
[62312 refs] line
