# The service prints an error line that contains the address line = io.recvuntil(b'***') # Example line: b'*** Error in `./crystal_rae_duke': free(): invalid next size (fast) 0x7fffffffdf40 ***\n' import re m = re.search(rb'0x[0-9a-fA-F]+', line) buf_addr = int(m.group(0), 16)

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