[mirror_edk2.git] / AppPkg / Applications / Python / Python-2.7.2 / Lib / test / crashers / borrowed_ref_1.py

"""\r
_PyType_Lookup() returns a borrowed reference.\r
This attacks the call in dictobject.c.\r
"""\r
\r
class A(object):\r
    pass\r
\r
class B(object):\r
    def __del__(self):\r
        print 'hi'\r
        del D.__missing__\r
\r
class D(dict):\r
    class __missing__:\r
        def __init__(self, *args):\r
            pass\r
\r
\r
d = D()\r
a = A()\r
a.cycle = a\r
a.other = B()\r
del a\r
\r
prev = None\r
while 1:\r
    d[5]\r
    prev = (prev,)\r
Commit	Line	Data
4710c53d	1	"""\r
	2	_PyType_Lookup() returns a borrowed reference.\r
	3	This attacks the call in dictobject.c.\r
	4	"""\r
	5	\r
	6	class A(object):\r
	7	pass\r
	8	\r
	9	class B(object):\r
	10	def __del__(self):\r
	11	print 'hi'\r
	12	del D.__missing__\r
	13	\r
	14	class D(dict):\r
	15	class __missing__:\r
	16	def __init__(self, *args):\r
	17	pass\r
	18	\r
	19	\r
	20	d = D()\r
	21	a = A()\r
	22	a.cycle = a\r
	23	a.other = B()\r
	24	del a\r
	25	\r
	26	prev = None\r
	27	while 1:\r
	28	d[5]\r
	29	prev = (prev,)\r