According to the spec, b"(123456\r\n" is a valid big number type, but I just got a ProtocolError, says Protocol error, got "(" as reply type byte, meanwhile, the pure python parser works well.

Step to reproduce:

import hiredis
reader = hiredis.Reader()
reader.feed(b"(123456\r\n")
print(reader.gets())

Maybe it's related to hiredis itself?