Index: Lib/inspect.py
===================================================================
--- Lib/inspect.py	(revision 60647)
+++ Lib/inspect.py	(working copy)
@@ -498,6 +498,8 @@
         else:
             raise IOError('could not find class definition')
 
+    if hasattr(object, 'func_closure') and object.func_closure:
+        object = object.func_closure[0].cell_contents
     if ismethod(object):
         object = object.im_func
     if isfunction(object):
@@ -512,7 +514,8 @@
         lnum = object.co_firstlineno - 1
         pat = re.compile(r'^(\s*def\s)|(.*(?<!\w)lambda(:|\s))|^(\s*@)')
         while lnum > 0:
-            if pat.match(lines[lnum]): break
+            if pat.match(lines[lnum]):
+                break
             lnum = lnum - 1
         return lines, lnum
     raise IOError('could not find code object')