Created attachment 10609 [details] [review]
Fix

Looks like a type mismatch:

double timeout_s = -1.0;

but float in

    if (!PyArg_ParseTuple(args, "O|f:send_message_with_reply_and_block", &obj,
                          &timeout_s)) {
        return NULL;
    }

Fixed in git, and the same fix for send_message_with_reply_and_block(). I'll release 0.82.1 soon, after I've checked for any other immediate bugs.