[issue6697] Check that _PyUnicode_AsString() result is not NULL

[STINNER Victor]

STINNER Victor <victor.stinner at haypocalc.com> added the comment:

Here is a fix for object.c (object_pyunicode_asstring-py3k.patch):

- PyObject_GenericGetAttr(): Replace PyErr_Format("... %.400s", ..., _PyUnicode_AsString(name)) by PyErr_Format("... %U", ..., name), as done in PyObject_GenericSetAttr(). Note that the string will no more be truncated to 400 bytes
- PyObject_GetAttr(), PyObject_SetAttr(): Catch _PyUnicode_AsString() error

It fixes the crash getattr(1, "\uDAD1\uD51E") (used as a test in the patch).

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title: Python 3.1 segfaults when invalid UTF-8 characters are	passed from command line -> Check that _PyUnicode_AsString() result is not NULL
Added file: http://bugs.python.org/file16442/object_pyunicode_asstring-py3k.patch

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