import io
import sys

def repro():
    br = io.BufferedReader(io.BytesIO(b"hello world"), buffer_size=8)

    huge = 10**18
    try:
        br.read1(huge)
    except Exception as e:
        print("first call exception:", type(e).__name__, e)

    try:
        x = br.read1(1)
        print("second call ok:", x)
    except Exception as e:
        print("second call exception:", type(e).__name__, e)

    br2 = io.BufferedReader(io.BytesIO(b"hello world"), buffer_size=8)
    print("fresh object read1:", br2.read1(1))

if __name__ == "__main__":
    print("python:", sys.version)
    repro()