[issue13700] imaplib.IMAP4.authenticate authobject fails with PLAIN mechanism

[Erno Tukia]

Erno Tukia <erno.tukia at iki.fi> added the comment:

File "/usr/lib/python3.1/imaplib.py", line 1257, in encode
    e = binascii.b2a_base64(t)

imaplib._Authenticator.encode() calls binascii.b2a_base64() function. In Python 2.6 that function returns a string, and in Python 3.1 it returns bytes. What is returned from b2a_base64() function is later in the encode() function concatenated with a string, with bytes that is not possible.

Should binascii.b2a_base64() return a string (2.6) or bytes (3.1)?

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<http://bugs.python.org/issue13700>
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