Merge pull request #2816 from embray/fix-domain-initial-data

Fix bug with copying of initial_data for Domains

CHANGES

@@ -26,6 +26,7 @@ Bugs fixed
 * #2789: `sphinx.ext.intersphinx` generates wrong hyperlinks if the inventory is given
 * parsing errors for caption of code-blocks are displayed in document (ref: #2845)
 * #2846: ``singlehtml`` builder does not include figure numbers
+* #2816: Fix data from builds cluttering the ``Domain.initial_data`` class attributes
 
 Release 1.4.5 (released Jul 13, 2016)
 =====================================

sphinx/domains/__init__.py

@@ -10,6 +10,8 @@
     :license: BSD, see LICENSE for details.
 """
 
+import copy
+
 from six import iteritems
 
 from sphinx.errors import SphinxError
@@ -145,7 +147,7 @@ class Domain(object):
         self.env = env
         if self.name not in env.domaindata:
             assert isinstance(self.initial_data, dict)
-            new_data = self.initial_data.copy()
+            new_data = copy.deepcopy(self.initial_data)
             new_data['version'] = self.data_version
             self.data = env.domaindata[self.name] = new_data
         else: