[issue13916] disallow the "surrogatepass" handler for non utf-* encodings

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

Here is a patch, which adds support for cp65001 and fixes test_cp1252. Please test it on Windows Vista.

Lone surrogates are not illegal in UTF-7 (see RFC 1642), so error handler is not called and explicit support of UTF-7 is not needed.

Could you please help with documenting this change in What's new Python 3.5 document? I don't think this change is worth special mentioning in codecs documentation, it is already documented that surrogatepass is supported only for utf-8, utf-16* and utf-32*.

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Added file: http://bugs.python.org/file35259/surrogatepass_cp_utf8.patch

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