diff --git a/sphinx/domains/c.py b/sphinx/domains/c.py
index 66a66c54f..68b5c2065 100644
--- a/sphinx/domains/c.py
+++ b/sphinx/domains/c.py
@@ -82,7 +82,7 @@ class CObject(ObjectDescription):
     ))
 
     def _parse_type(self, node, ctype):
-        # type: (nodes.Node, unicode) -> None
+        # type: (nodes.Element, unicode) -> None
         # add cross-ref nodes for all words
         for part in [_f for _f in wsplit_re.split(ctype) if _f]:
             tnode = nodes.Text(part, part)
diff --git a/sphinx/environment/__init__.py b/sphinx/environment/__init__.py
index a5e9dfe7c..b02c8f239 100644
--- a/sphinx/environment/__init__.py
+++ b/sphinx/environment/__init__.py
@@ -146,7 +146,7 @@ class BuildEnvironment:
         self.longtitles = {}        # type: Dict[unicode, nodes.title]
                                     # docname -> title node; only different if
                                     # set differently with title directive
-        self.tocs = {}              # type: Dict[unicode, nodes.Element]
+        self.tocs = {}              # type: Dict[unicode, nodes.bullet_list]
                                     # docname -> table of contents nodetree
         self.toc_num_entries = {}   # type: Dict[unicode, int]
                                     # docname -> number of real entries
diff --git a/sphinx/transforms/post_transforms/__init__.py b/sphinx/transforms/post_transforms/__init__.py
index de1aa52ba..edc5c293f 100644
--- a/sphinx/transforms/post_transforms/__init__.py
+++ b/sphinx/transforms/post_transforms/__init__.py
@@ -74,11 +74,11 @@ class ReferencesResolver(SphinxTransform):
             node.replace_self(newnode or contnode)
 
     def resolve_anyref(self, refdoc, node, contnode):
-        # type: (unicode, addnodes.pending_xref, nodes.Node) -> nodes.Node
+        # type: (unicode, addnodes.pending_xref, nodes.TextElement) -> nodes.Element
         """Resolve reference generated by the "any" role."""
         stddomain = self.env.get_domain('std')
         target = node['reftarget']
-        results = []  # type: List[Tuple[unicode, nodes.Node]]
+        results = []  # type: List[Tuple[unicode, nodes.Element]]
         # first, try resolving as :doc:
         doc_ref = stddomain.resolve_xref(self.env, refdoc, self.app.builder,
                                          'doc', target, node, contnode)
@@ -116,7 +116,9 @@ class ReferencesResolver(SphinxTransform):
         # Override "any" class with the actual role type to get the styling
         # approximately correct.
         res_domain = res_role.split(':')[0]
-        if newnode and newnode[0].get('classes'):
+        if (len(newnode) > 0 and
+                isinstance(newnode[0], nodes.Element) and
+                newnode[0].get('classes')):
             newnode[0]['classes'].append(res_domain)
             newnode[0]['classes'].append(res_role.replace(':', '-'))
         return newnode
diff --git a/sphinx/util/docfields.py b/sphinx/util/docfields.py
index 61d88055b..22080f95b 100644
--- a/sphinx/util/docfields.py
+++ b/sphinx/util/docfields.py
@@ -217,7 +217,7 @@ class TypedField(GroupedField):
                 # inconsistencies later when references are resolved
                 fieldtype = types.pop(fieldarg)
                 if len(fieldtype) == 1 and isinstance(fieldtype[0], nodes.Text):
-                    typename = u''.join(n.astext() for n in fieldtype)
+                    typename = fieldtype[0].astext()
                     par.extend(self.make_xrefs(self.typerolename, domain, typename,
                                                addnodes.literal_emphasis, env=env))
                 else:
diff --git a/sphinx/writers/texinfo.py b/sphinx/writers/texinfo.py
index f26067c26..c32b1ccca 100644
--- a/sphinx/writers/texinfo.py
+++ b/sphinx/writers/texinfo.py
@@ -1205,7 +1205,8 @@ class TexinfoTranslator(SphinxTranslator):
     def visit_admonition(self, node, name=''):
         # type: (nodes.admonition, unicode) -> None
         if not name:
-            name = self.escape(node[0].astext())
+            title = cast(nodes.title, node[0])
+            name = self.escape(title.astext())
         self.body.append(u'\n@cartouche\n@quotation %s ' % name)
 
     def _visit_named_admonition(self, node):
@@ -1279,7 +1280,7 @@ class TexinfoTranslator(SphinxTranslator):
         # ignore TOC's since we have to have a "menu" anyway
         if 'contents' in node.get('classes', []):
             raise nodes.SkipNode
-        title = node[0]
+        title = cast(nodes.title, node[0])
         self.visit_rubric(title)
         self.body.append('%s\n' % self.escape(title.astext()))