[issue7111] core dump when stderr is moved
Daniel Stutzbach
report at bugs.python.org
Wed Oct 14 02:11:13 CEST 2009
Daniel Stutzbach <daniel at stutzbachenterprises.com> added the comment:
Is it even possible to portably test the validity of a file descriptor
without trying to write/read it?
When I first saw this bug, my gut feeling was "well, don't do that
then!" However, I then recalled that Windows GUI applications have no
stdin, stdout, or stderr.
Python 2 will raise IOError: Bad File Descriptor when the user tries to
write to stdout or stderr (more accurately, it raises the exception when
trying to flush data to the file descriptor).
I just tested pythonw.exe. If I set sys.stderr by hand to a file, then
write to sys.stdout, 2.6 will correctly write the exception to the file.
3.1 exits silently.
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