[issue7561] PyByteArray_AS_STRING used unsafely

[Antoine Pitrou]

Antoine Pitrou <pitrou at free.fr> added the comment:

Here is a patch. A static empty string is used in case PyByteArray_AS_STRING() is asked on an empty bytearray, instead of returning NULL.

Another possibility would be to implement tp_new for bytearray and always allocate a new 1-byte string, but this would make the patch slightly more complicated.

(the patch also removes "nullstring", which was unused since Florent's recent patches)

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Added file: http://bugs.python.org/file15924/bytearray.patch

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