BulkNil and execArrayReply breaking xread

[zifeo]

Currently execArrayReply casts its return to Array<T> but because of the change with BulkNil the function does not always return an array but also null. This breaks at least xread when the command return nothing (and likely also xreadgroup).

Example:

import { connect } from "https://deno.land/x/[email protected]/mod.ts";

const conf = { hostname: "localhost", port: 6379, password: "password", db: 0 };
const r1 = await connect(conf);
const r2 = await connect(conf);

const key = "topic";

(async () => {
  let cursor = "$";
  while (true) {
    try {
      const [stream] = await r1.xread(
        [{ key, xid: cursor }],
        {
          block: 5000,
        },
      );
      if (!stream) {
        continue;
      }
      for (const { xid, fieldValues } of stream.messages) {
        console.log(fieldValues);
        cursor = xid;
      }
    } catch (error) {
      console.error(error);
    }
  }
})();

(async () => {
  let c = 0;
  while (true) {
    try {
      await r2.xadd(
        key,
        "*",
        { c },
        { approx: true, elements: 10 },
      );
      c += 1;
      await new Promise((resolve) => setTimeout(resolve, 6000));
    } catch (error) {
      console.error(error);
    }
  }
})();

Produces:

TypeError: raw is not iterable
    at parseXReadReply (https://deno.land/x/[email protected]/stream.ts:255:31)
    at https://deno.land/x/[email protected]/redis.ts:1908:21
    at async file:///Users/teostocco/Documents/metatype/metatype/repro.ts:13:24