Fix #4156: failed to parse class comment

2 files changed, 13 insertions, 0 deletions

diff --git a/sphinx/pycode/parser.py b/sphinx/pycode/parser.py
index d488842e9..9b5cb13c9 100644
--- a/sphinx/pycode/parser.py
+++ b/sphinx/pycode/parser.py
@@ -336,6 +336,7 @@ class VariableCommentPicker(ast.NodeVisitor):
         self.current_classes.append(node.name)
         self.add_entry(node.name)
         self.context.append(node.name)
+        self.previous = node
         for child in node.body:
             self.visit(child)
         self.context.pop()
diff --git a/tests/test_pycode_parser.py b/tests/test_pycode_parser.py
index cfea2ca00..8b7a945d4 100644
--- a/tests/test_pycode_parser.py
+++ b/tests/test_pycode_parser.py
@@ -226,6 +226,18 @@ def test_nested_class():
                                 'Foo.Bar.attr2': 3}
 
 
+def test_class_comment():
+    source = ('import logging\n'
+              'logger = logging.getLogger(__name__)\n'
+              '\n'
+              'class Foo(object):\n'
+              '    """Bar"""\n')
+    parser = Parser(source)
+    parser.parse()
+    assert parser.comments == {}
+    assert parser.definitions == {'Foo': ('class', 4, 5)}
+
+
 def test_comment_picker_multiline_string():
     source = ('class Foo(object):\n'
               '    a = None\n'