cpython/Lib/test/crashers/dictresize_attack.py

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# http://www.python.org/sf/1456209
# A dictresize() attack. If oldtable == mp->ma_smalltable then pure
# Python code can mangle with mp->ma_smalltable while it is being walked
# over.
class X(object):
def __hash__(self):
return 5
def __eq__(self, other):
if resizing:
d.clear()
return False
d = {}
resizing = False
d[X()] = 1
d[X()] = 2
d[X()] = 3
d[X()] = 4
d[X()] = 5
# now trigger a resize
resizing = True
d[9] = 6
# ^^^ I get Segmentation fault or Illegal instruction here.