oops, sorry reprinted the same code ^^;;; ignore previous post, & use
this: (sorry again for mucking up this page)

################################
# super_ok.py
class A(object):
  def foo(self):
    return super()
    # comment the closure below
    # & SystemError goes away
    # lambda: self
A().foo()
################################

>>> s = open("super_ok.py").read(); c = compile(s, "super_ok.py",
"exec"); t = py3to2.codetree(c)
>>> print( t )
codetree(
co_argcount =     0,
co_cellvars =     (),
co_code =        
b'Gd\x00\x00\x84\x00\x00d\x01\x00e\x00\x00\x83\x03\x00Z\x01\x00e\x01\x00\x83\x00\x00j\x02\x00\x83\x00\x00\x01d\x02\x00S',
co_filename =     'super_ok.py',
co_firstlineno =  3,
co_flags =        64,
co_freevars =     (),
co_kwonlyargcount =0,
co_lnotab =       b'\x13\x06',
co_name =         '<module>',
co_names =        ('object', 'A', 'foo'),
co_nlocals =      0,
co_stacksize =    4,
co_varnames =     (),
depth =           0,
co_consts = (
 codetree(
 co_argcount =     1,
 co_cellvars =     ('__class__',),
 co_code =        
b'|\x00\x00Ee\x00\x00Z\x01\x00\x87\x00\x00f\x01\x00d\x00\x00\x86\x00\x00Z\x02\x00\x87\x00\x00S',
 co_filename =     'super_ok.py',
 co_firstlineno =  3,
 co_flags =        2,
 co_freevars =     (),
 co_kwonlyargcount =0,
 co_lnotab =       b'\n\x01',
 co_name =         'A',
 co_names =        ('__name__', '__module__', 'foo'),
 co_nlocals =      1,
 co_stacksize =    2,
 co_varnames =     ('__locals__',),
 depth =           1,
 co_consts = (
  codetree(
  co_argcount =     1,
  co_cellvars =     (),
  co_code =         b't\x00\x00\x83\x00\x00S',
  co_filename =     'super_ok.py',
  co_firstlineno =  4,
  co_flags =        3,
  co_freevars =     ('__class__',),
  co_kwonlyargcount =0,
  co_lnotab =       b'\x00\x01',
  co_name =         'foo',
  co_names =        ('super',),
  co_nlocals =      1,
  co_stacksize =    1,
  co_varnames =     ('self',),
  depth =           2,
  co_consts = (
   None,
   )),
  )),
 A,
 None,
 ))
>>> print( t.dis() )
  3           0 LOAD_BUILD_CLASS
              1 LOAD_CONST               0 (<code object A at
0x2a987afd30, file "super_ok.py", line 3>)
              4 MAKE_FUNCTION            0
              7 LOAD_CONST               1 ('A')
             10 LOAD_NAME                0 (object)
             13 CALL_FUNCTION            3
             16 STORE_NAME               1 (A)

  9          19 LOAD_NAME                1 (A)
             22 CALL_FUNCTION            0
             25 LOAD_ATTR                2 (foo)
             28 CALL_FUNCTION            0
             31 POP_TOP
             32 LOAD_CONST               2 (None)
             35 RETURN_VALUE

      3           0 LOAD_FAST                0 (__locals__)
                  3 STORE_LOCALS
                  4 LOAD_NAME                0 (__name__)
                  7 STORE_NAME               1 (__module__)

      4          10 LOAD_CLOSURE             0 (__class__)
                 13 BUILD_TUPLE              1
                 16 LOAD_CONST               0 (<code object foo at
0x2a984c0530, file "super_ok.py", line 4>)
                 19 MAKE_CLOSURE             0
                 22 STORE_NAME               2 (foo)
                 25 LOAD_CLOSURE             0 (__class__)
                 28 RETURN_VALUE

          5           0 LOAD_GLOBAL              0 (super)
                      3 CALL_FUNCTION            0
                      6 RETURN_VALUE

>>>