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import os
import textwrap
import unittest
from test.support import os_helper
from test.support.script_helper import assert_python_ok
class TestLLTrace(unittest.TestCase):
def test_lltrace_does_not_crash_on_subscript_operator(self):
# If this test fails, it will reproduce a crash reported as
# bpo-34113. The crash happened at the command line console of
# debug Python builds with __ltrace__ enabled (only possible in console),
# when the internal Python stack was negatively adjusted
with open(os_helper.TESTFN, 'w', encoding='utf-8') as fd:
self.addCleanup(os_helper.unlink, os_helper.TESTFN)
fd.write(textwrap.dedent("""\
import code
console = code.InteractiveConsole()
console.push('__ltrace__ = 1')
console.push('a = [1, 2, 3]')
console.push('a[0] = 1')
print('unreachable if bug exists')
"""))
assert_python_ok(os_helper.TESTFN)
if __name__ == "__main__":
unittest.main()
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