STINNER Victor added the comment:
Python 2.7 doesn't seem to be affected by this issue. Extract of Popen.__init__:
try:
self._execute_child(args, executable, preexec_fn, close_fds,
cwd, env, universal_newlines,
startupinfo, creationflags, shell, to_close,
p2cread, p2cwrite,
c2pread, c2pwrite,
errread, errwrite)
except Exception:
# Preserve original exception in case os.close raises.
exc_type, exc_value, exc_trace = sys.exc_info()
for fd in to_close:
try:
if mswindows:
fd.Close()
else:
os.close(fd)
except EnvironmentError:
pass
On Windows, fd.Close() is always used.
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<http://bugs.python.org/issue30121>
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