% python3
Python 3.3.2 (v3.3.2:d047928ae3f6, May 13 2013, 13:52:24) 
[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> help(bytes)
bytes constructor accepts more than one argument even of the first one is not a string (and then the other arguments are checked to be strings):

    >>> bytes(2, "foo", "bar")
    b'\x00\x00'
    >>> bytes(2, "foo")
    b'\x00\x00'

but:

    >>> bytes(2, 1)
    Traceback (most recent call last):
      File "<stdin>", line 1, in <module>
    TypeError: bytes() argument 2 must be str, not int

This shows the report to be wrong, you either have to pass an iterable of ints or a single int.  Even the title is wrong, it doesn't accept more than one argument if the first one isn't a string, it raises a TypeError.

Python 3.3.3 (v3.3.3:c3896275c0f6, Nov 18 2013, 21:18:40) [MSC v.1600 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> help(bytes)
Help on class bytes in module builtins:

class bytes(object)
 |  bytes(iterable_of_ints) -> bytes
 |  bytes(string, encoding[, errors]) -> bytes
 |  bytes(bytes_or_buffer) -> immutable copy of bytes_or_buffer
 |  bytes(int) -> bytes object of size given by the parameter initialized with null bytes
 |  bytes() -> empty bytes object

LGTM. Do you want to provide a test Renaud?

Here is a patch with tests.

New changeset 8badbd65840e by Serhiy Storchaka in branch '3.4':
Issue #20335: bytes constructor now raises TypeError when encoding or errors
https://hg.python.org/cpython/rev/8badbd65840e

New changeset 8d6b27837c69 by Serhiy Storchaka in branch 'default':
Issue #20335: bytes constructor now raises TypeError when encoding or errors
https://hg.python.org/cpython/rev/8d6b27837c69

Thank you for your patch Renaud.