AppPkg/Applications/Python/Python-2.7.2/Lib/test/crashers/borrowed_ref_1.py

   1 """
   2 _PyType_Lookup() returns a borrowed reference.
   3 This attacks the call in dictobject.c.
   4 """
   5
   6 class A(object):
   7     pass
   8
   9 class B(object):
  10     def __del__(self):
  11         print 'hi'
  12         del D.__missing__
  13
  14 class D(dict):
  15     class __missing__:
  16         def __init__(self, *args):
  17             pass
  18
  19
  20 d = D()
  21 a = A()
  22 a.cycle = a
  23 a.other = B()
  24 del a
  25
  26 prev = None
  27 while 1:
  28     d[5]
  29     prev = (prev,)