monty 0.0.21

A sandboxed, snapshotable Python interpreter written in Rust.
Documentation 
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# call-external
# BUG: This test hangs (infinite loop) - external calls in boolean expressions
# with side effects cause incorrect behavior.

call_count = 0


def side_effect(val):
    global call_count
    call_count += 1
    return val


# This specific pattern causes a hang in Monty
result = return_value(True) and return_value(side_effect(42))
assert result == 42
assert call_count == 1