[issue18298] pythonw.exe fails with redirected stderr
anatoly techtonik
report at bugs.python.org
Tue Jun 25 11:26:22 CEST 2013
anatoly techtonik added the comment:
This subprocess.communicate() call fails with pythonw.exe
--cut testhg.py--
import subprocess
hg = "hg"
output, _err = subprocess.Popen([hg, 'id', '-nib'],
stdout=subprocess.PIPE).communicate()
open("-hg-", "w").write(output)
--cut testhg.py--
When testhg.py is run with python.exe from cmd.exe session, the -hg- file is created ok. When pythonw.exe is used, nothing happens. When redirecting stderr from pythonw.exe with:
C:\Python27\pythonw.exe testhg.py 2>1
1 contains the following stacktrace:
Traceback (most recent call last):
File "testhg.py", line 5, in <module>
stdout=subprocess.PIPE).communicate()
File "C:\Python27\lib\subprocess.py", line 672, in __init__
errread, errwrite) = self._get_handles(stdin, stdout, stderr)
File "C:\Python27\lib\subprocess.py", line 787, in _get_handles
p2cread = self._make_inheritable(p2cread)
File "C:\Python27\lib\subprocess.py", line 826, in _make_inheritable
_subprocess.DUPLICATE_SAME_ACCESS)
WindowsError: [Error 6] The handle is invalid
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<http://bugs.python.org/issue18298>
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