Fails to decode unicode characters for horizon/bootstrap.scss

[Wed Sep 24 17:12:27.060689 2014] [:error] [pid 21040:tid 139857694197504] raise SassEvaluationError(e, expression=expr)
[Wed Sep 24 17:12:27.060693 2014] [:error] [pid 21040:tid 139857694197504] SassEvaluationError: Error evaluating expression:
[Wed Sep 24 17:12:27.060698 2014] [:error] [pid 21040:tid 139857694197504] (twbs-font-path("") != unquote('twbs-font-path("")'))
[Wed Sep 24 17:12:27.060702 2014] [:error] [pid 21040:tid 139857694197504]
[Wed Sep 24 17:12:27.060706 2014] [:error] [pid 21040:tid 139857694197504] From bootstrap/scss/bootstrap/_variables.scss:1
[Wed Sep 24 17:12:27.060711 2014] [:error] [pid 21040:tid 139857694197504] ...imported from bootstrap/scss/bootstrap.scss:6
[Wed Sep 24 17:12:27.060716 2014] [:error] [pid 21040:tid 139857694197504] ...imported from <string u'// bootstrap overrides:\\n$icon-font-path: "../../bo'...>:0
[Wed Sep 24 17:12:27.060720 2014] [:error] [pid 21040:tid 139857694197504] Traceback:
[Wed Sep 24 17:12:27.060725 2014] [:error] [pid 21040:tid 139857694197504] File "/usr/lib/python2.7/dist-packages/scss/expression.py", line 130, in evaluate_expression
[Wed Sep 24 17:12:27.060729 2014] [:error] [pid 21040:tid 139857694197504] return ast.evaluate(self, divide=divide)
[Wed Sep 24 17:12:27.060734 2014] [:error] [pid 21040:tid 139857694197504] File "/usr/lib/python2.7/dist-packages/scss/expression.py", line 182, in evaluate
[Wed Sep 24 17:12:27.060738 2014] [:error] [pid 21040:tid 139857694197504] return self.contents.evaluate(calculator, divide=True)
[Wed Sep 24 17:12:27.060743 2014] [:error] [pid 21040:tid 139857694197504] File "/usr/lib/python2.7/dist-packages/scss/expression.py", line 207, in evaluate
[Wed Sep 24 17:12:27.060747 2014] [:error] [pid 21040:tid 139857694197504] left = self.left.evaluate(calculator, divide=True)
[Wed Sep 24 17:12:27.060752 2014] [:error] [pid 21040:tid 139857694197504] File "/usr/lib/python2.7/dist-packages/scss/expression.py", line 329, in evaluate
[Wed Sep 24 17:12:27.060757 2014] [:error] [pid 21040:tid 139857694197504] six.u("%s(%s)" % (func_name, six.u(", ".join(rendered_args)))),
[Wed Sep 24 17:12:27.060762 2014] [:error] [pid 21040:tid 139857694197504] File "/usr/lib/python2.7/dist-packages/six.py", line 589, in u
[Wed Sep 24 17:12:27.060766 2014] [:error] [pid 21040:tid 139857694197504] return unicode(s.replace(r'\\\\', r'\\\\\\\\'), "unicode_escape")
[Wed Sep 24 17:12:27.060774 2014] [:error] [pid 21040:tid 139857694197504] TypeError: decoding Unicode is not supported
[Wed Sep 24 17:12:27.060778 2014] [:error] [pid 21040:tid 139857694197504]

ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: python-django-pyscss 1.0.1-2ubuntu2
ProcVersionSignature: Ubuntu 3.16.0-14.20-generic 3.16.2
Uname: Linux 3.16.0-14-generic x86_64
ApportVersion: 2.14.7-0ubuntu2
Architecture: amd64
CurrentDesktop: Unity
Date: Wed Sep 24 21:17:40 2014
EcryptfsInUse: Yes
InstallationDate: Installed on 2014-04-28 (149 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
PackageArchitecture: all
SourcePackage: python-django-pyscss
UpgradeStatus: Upgraded to utopic on 2014-06-05 (111 days ago)