Issue1107

Parsing a string literal containing the character sequence backslash, 
cr, and linefeed (such as you would find in a string literal 
continuation line in a file with dos line endings) raises a cryptic 
exception:
>>> eval('"\\\r\n"')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<string>", line 0
SyntaxError: mismatched input  expecting Type (<string>, line 0)
>>>

Your code raises an exception in python 2.5.1 as well:

>>> eval('"\\\r\n"')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<string>", line 1
    "\
      ^
SyntaxError: EOL while scanning single-quoted string

I agree the message is not that clear, but running the same code in
python tells you exactly what's going on.

Since this fails in CPython too, I'm closing it.  If the submitter wants
to put in another bug "Exception messages for parse errors need to match
better", I'd be fine with that.