Fix a crash on parallel building. (rhbz#1494276)

python-sphinx.spec

@@ -15,7 +15,7 @@
 
 Name:       python-sphinx
 Version:    1.5.2
-Release:    2%{?dist}
+Release:    3%{?dist}
 Summary:    Python documentation generator
 
 Group:      Development/Tools
@@ -28,6 +28,13 @@ License:    BSD and Public Domain and Python and (MIT or GPLv2)
 URL:        http://sphinx-doc.org/
 Source0:    https://files.pythonhosted.org/packages/source/S/%{upstream_name}/%{upstream_name}-%{version}.tar.gz
 
+# Backport of a bugfix from the 1.6 upstream branch of sphinx
+# to address a crash with parallel building.
+# https://bugzilla.redhat.com/show_bug.cgi?id=1494276
+# Upstream commit:
+# https://github.com/sphinx-doc/sphinx/pull/4039/commits/0cb57f19a099be2809a8fb5dc9274f7411e1caac
+Patch0: fix-crash-on-parallel-build.patch
+
 BuildArch:     noarch
 BuildRequires: python2-devel >= 2.4
 BuildRequires: python2-babel
@@ -567,6 +574,9 @@ fi
 
 
 %changelog
+* Fri Sep 22 2017 Charalampos Stratakis <cstratak@redhat.com> - 1.5.2-3
+- Fix a crash on parallel build.
+
 * Sat Feb 18 2017 Toshio Kuratomi <toshio@fedoraproject.org> - - 1.5.2-2
 - Assign %%attrs to %%ghosted files so that rpm knows what permissions they
   should have.