Max recursion depth error when using HTTPDigestAuth

Run a server with HTTP Digest Authentication and then run the attached script.

Expected result:
"401"

Actual result:
RuntimeError: maximum recursion depth exceeded while calling a Python object

This bug exists in python-requests 1.1.0-1.
It is not reproducable with upstream 1.2.3 (pip install requests)

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: python-requests 1.1.0-1
ProcVersionSignature: Ubuntu 3.8.0-29.42-generic 3.8.13.5
Uname: Linux 3.8.0-29-generic x86_64
ApportVersion: 2.9.2-0ubuntu8.3
Architecture: amd64
Date: Thu Aug 22 10:30:13 2013
EcryptfsInUse: Yes
InstallationDate: Installed on 2011-02-16 (917 days ago)
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
MarkForUpload: True
PackageArchitecture: all
SourcePackage: requests
UpgradeStatus: Upgraded to raring on 2013-04-26 (118 days ago)