Closes #1673: fix crashes with nitpick_ignore and :doc: references.

CHANGES

@@ -27,6 +27,7 @@ Bugs fixed
 * #1610: Sphinx cause AttributeError when MeCab search option is enabled and
   python-mecab is not installed.
 * #1674: Do not crash if a module's ``__all__`` is not a list of strings.
+* #1673: Fix crashes with :confval:`nitpick_ignore` and ``:doc:`` references.
 
 
 Release 1.2.3 (released Sep 1, 2014)

sphinx/environment.py

@@ -1406,7 +1406,8 @@ class BuildEnvironment:
                 if (dtype, target) in self._nitpick_ignore:
                     warn = False
                 # for "std" types also try without domain name
-                if domain.name == 'std' and (typ, target) in self._nitpick_ignore:
+                if (not domain or domain.name == 'std') and \
+                   (typ, target) in self._nitpick_ignore:
                     warn = False
         if not warn:
             return