[issue7330] PyUnicode_FromFormat segfault

[STINNER Victor]

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

> Oh, what if the trunked char* cannot be decoded correctly?
> e.g. a tow-bytes character is divided in the middle? 

Yes, but PyUnicode_FromFormatV() uses UTF-8 decoder with replace error handler, and so the incomplete byte sequence will be replaced by � (it doesn't fail with an error). Example:

>>> "abc€".encode("utf-8")[:-1].decode("utf-8", "replace")
'abc�'

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<http://bugs.python.org/issue7330>
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