"""
PoC: binomialvariate crash caused by random() returning 0.0.
Run: python bug_demo.py
"""
from math import log2, floor
def simulate_crash(c, n):
    """Simulate the buggy BG branch with random() hardcoded to 0.0.
    Records the iteration count at which the crash occurs."""
    x = y = 0
    iter_count = 0
    while True:
        iter_count += 1
        rand_val = 0.0            # simulate the rare event of hitting exactly 0.0
        try:
            log_rand = log2(rand_val)
        except ValueError as e:
            print(f"Crashed at iteration {iter_count}: {e}")
            return None, iter_count
        y += floor(log_rand / c) + 1
        if y > n:
            return x, iter_count
        x += 1
if __name__ == "__main__":
    c = log2(0.5)   # -1.0
    result, count = simulate_crash(c, n=1)
    if result is None:
        print(f"Program crashed after {count} iteration(s) (crashed immediately).")
    else:
        print(f"Result {result}, loop ran {count} iteration(s)")