circuitpython/tests/stress/recursive_data.py

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# This tests that printing recursive data structure doesn't lead to segfault.
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try:
import io
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except ImportError:
print("SKIP")
raise SystemExit
l = [1, 2, 3, None]
l[-1] = l
try:
print(l, file=io.StringIO())
except RuntimeError:
print("RuntimeError")