Ray.Allen <ysj....@gmail.com> added the comment:
This is because when an subprocess.CalledProcessError is raised, the
CalledProcessError instance is picked through a socket and then read by
"parent" process, but in fact CalledProcessError instances cannot be picked
correctly. Because CalledProcessError extends PyExc_BaseException, which
defines a __reduce__ method, that special method cause the pickle load to call
the exception type's __init__ method with packed self.args as arguments. So if
a subclass of "Exception" needs to behave correctly in pickling, it should make
self.args meats its __init__ method's function signature. That is, ensure the
calling to:
self.__init__(*self.args)
has no problem.
But CalledProcessError doesn't meat this requirement. Here is a patch fixing
the CalledProcessError.__init__ to call its base class's __init__ to store its
arguments in self.args, which can fix this bug.
----------
keywords: +patch
Added file: http://bugs.python.org/file18309/issue9400.diff
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