visit children nodes, fix regression

Cython/Compiler/ParseTreeTransforms.py

@@ -1789,10 +1789,8 @@ class AnalyseExpressionsTransform(CythonTransform):
         return node
 
     def visit_AttributeNode(self, node):
-        # Note: Expression analysis for attributes has already happened
-        # at this point (by recursive calls starting from FuncDefNode)
-        #print node.dump()
-        #return node
+        self.visitchildren(node)
+
         type = node.obj.type
         if type.is_extension_type and type.objstruct_cname == 'PyArrayObject':
             from NumpySupport import numpy_transform_attribute_node

tests/run/attribute_and_lambda.pyx

+# mode: run
+# tags: lambda, attribute, regression
+
+class TestClass(object):
+    bar = 123
+
+
+def test_attribute_and_lambda(f):
+    """
+    >>> test_attribute_and_lambda(lambda _: TestClass())
+    123
+    """
+    return f(lambda x: x).bar