Mailing List Archive: [issue5099] subprocess.POpen.__del__() AttributeError (os module == None!)

[issue5099] subprocess.POpen.__del__() AttributeError (os module == None!)

Jan 29, 2009, 8:01 AM

Post #1 of 4 (228 views)

Changes by Mary Stern <marystern@yahoo.com>:

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title: subprocess.POpen.__del__() AttribuetError (os module == None!) -> subprocess.POpen.__del__() AttributeError (os module == None!)

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[issue5099] subprocess.POpen.__del__() AttributeError (os module == None!) [ In reply to ]

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Jan 29, 2009, 8:31 AM

Post #2 of 4 (235 views)

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Changes by David W. Lambert <lambertdw@corning.com>:

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nosy: +LambertDW

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[issue5099] subprocess.POpen.__del__() AttributeError (os module == None!) [ In reply to ]

report at bugs

Jan 30, 2009, 7:58 PM

Post #3 of 4 (212 views)

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Gabriel Genellina <gagsl-py2@yahoo.com.ar> added the comment:

At interpreter shutdown, the module's global variables are set to None
before the module itself is released. __del__ methods may be called in
those precaries circumstances, and should not rely on any global state.

A temporary fix would be to make Popen._internal_poll and
Popen._handle_exitstatus keep a reference to the os module (just add a
default argument os=os, like sys=sys in __del__). But this is just a
hack; the real fix would be to avoid defining __del__ at all.

A patch for subprocess.py is attached.

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components: +Library (Lib)
keywords: +patch
nosy: +gagenellina
Added file: http://bugs.python.org/file12901/subprocess.diff

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[issue5099] subprocess.POpen.__del__() AttributeError (os module == None!) [ In reply to ]

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Jan 30, 2009, 8:14 PM

Post #4 of 4 (215 views)

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Gabriel Genellina <gagsl-py2@yahoo.com.ar> added the comment:

Patch and test case against trunk

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versions: +Python 2.7, Python 3.0, Python 3.1
Added file: http://bugs.python.org/file12902/test_subprocess.diff

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