Zachary Ware added the comment:
Sorry, Terry; I updated the resolution because the issue was not closed, and
the versions to match the currently acceptable branches after a discussion at
the Bloomberg sprint, but failed to elaborate on what the actual bug here is
that came out of that discussion.
The actual problem is with any warning raised by exec'ing a string:
C:\Temp>type exectest.py
# line 1
import os
os.listdir(b'.') # line 5
exec("os.listdir(b'.')") # line 7
C:\Temp>py -3.4 -Wall exectest.py
exectest.py:5: DeprecationWarning: The Windows bytes API has been deprecated,
use Unicode filenames instead
os.listdir(b'.') # line 5
exectest.py:1: DeprecationWarning: The Windows bytes API has been deprecated,
use Unicode filenames instead
# line 1
C:\Temp>type exectest-2.7.py
# line 1
"test" > 3 # line 3
exec("'test' > 3") # line 5
C:\Temp>py -2.7 -3 -Wall exectest-2.7.py
exectest-2.7.py:3: DeprecationWarning: comparing unequal types not supported in
3.x
"test" > 3 # line 3
exectest-2.7.py:1: DeprecationWarning: comparing unequal types not supported in
3.x
# line 1
----------
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