Fix crash on any-references with unicode.

Fixes sphinx-doc/sphinx#2555.

CHANGES

@@ -54,6 +54,7 @@ Bugs fixed
 * #2526: LaTeX writer crashes if the section having only images
 * #2522: Sphinx touches mo files under installed directory that caused permission error.
 * #2536: C++, fix crash when an immediately nested scope has the same name as the current scope.
+* #2555: Fix crash on any-references with unicode.
 
 
 Release 1.4.1 (released Apr 12, 2016)

sphinx/domains/cpp.py

@@ -4100,7 +4100,7 @@ class CPPDomain(Domain):
             parser.assert_end()
         except DefinitionError as e:
             warner.warn('Unparseable C++ cross-reference: %r\n%s'
-                        % (target, str(e.description)))
+                        % (target, text_type(e.description)))
             return None, None
         parentKey = node.get("cpp:parent_key", None)
         rootSymbol = self.data['root_symbol']