[New-bugs-announce] [issue19208] Bas64.decodestring() returns data instead of throwing exception

[Tymoteusz Paul]

New submission from Tymoteusz Paul:

What happens (and how to reproduce):

import base64
str = """GET http://www.google.com.hk/search?q=hotels+near+airport&pws=1&igu=1&ip=0.0.0.0&safe=images&gl=CN&gll=39.913889,116.391667&near=china&hl=zh-CN HTTP/1.0\nContent-Length: 0\nUser-Agent: Opera/9.80 (X11; Linux i686; U; en-US) Presto/2.9.173 Version/12.00\nProxy-Authorization: Basic\nAuthorization: Basic\nReferer: http://www.google.com/\n\n"""
base64.decodestring(str)

What is expected:
Exception should be throw as provided string is not encoded with base64. 

What is the result:
We receive some garbage string which hex representation is '\x18D\xe1\xb6\xda\x7f\xff\x0c0\x82\x8a \x95\xe7(\x9a\x19?\xb1\xe6\xabr\x1a'

----------
messages: 199299
nosy: Tymoteusz.Paul
priority: normal
severity: normal
status: open
title: Bas64.decodestring() returns data instead of throwing exception
type: behavior
versions: Python 2.7

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue19208>
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