Steve Dower added the comment:
How's this for the test (I added an explanatory comment, since it may look like
it isn't testing anything to someone who isn't familiar with the issue):
def test_strftime_format_check(self):
# Test that strftime does not crash on invalid format strings
# that may trigger a buffer overread. When not triggered,
# strftime may succeed or raise ValueError depending on
# the platform.
for x in [ '', 'A', '%A', '%AA' ]:
for y in range(0x0, 0x10):
for z in [ '%', 'A%', 'AA%', '%A%', 'A%A%', '%#' ]:
try:
time.strftime(x * y + z)
except ValueError:
pass
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<http://bugs.python.org/issue24917>
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