Amaury Forgeot d'Arc <[EMAIL PROTECTED]> added the comment:
I think I got the point: to decode strings like "\N{CHARACTER NAME}"
PyUnicode_DecodeUnicodeEscape imports the unicodedata module.
If this fails, PyErr_SetString(PyExc_UnicodeError, "some message")
is called.
The exception will eventually be caught by ast_for_atom (in
Python/ast.c), but the exception there is not normalized: type is
PyExc_UnicodeError when the value is a string. Hence the invalid cast.
The exception cannot be normalized there: UnicodeError.__init__ needs 5
arguments.
I think the error was to call PyErr_SetString in the first place.
The attached patch replaces it with PyErr_SetObject and a full
UnicodeDecodeError object.
This deserves a unit test, but I wonder how to reliably make the import
fail.
----------
keywords: +needs review
nosy: +amaury.forgeotdarc
Added file: http://bugs.python.org/file12078/bad_unicodeerror.patch
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