FLUSHALL causes Exception has occurred: TypeError: Cannot read properties of null (reading 'toString')

[ltwlf]

When you FLUSHALL with change tracking and server side assisted client caching you'll get a "TypeError: Cannot read properties of null (reading 'toString')" error in the redis:invalidate subscription.

The error is caused because FLUSHALL sends a "null" message to all tracking clients to signal they should flush theirs in memory cache.
(https://redis.io/topics/client-side-caching)

Stack:
Exception has occurred: TypeError: Cannot read properties of null (reading 'toString')
at Function._RedisCommandsQueue_emitPubSubMessage (/home/ltwlf/git/pag/EMOS/server/node_modules/@node-redis/client/dist/lib/client/commands-queue.js:228:94)

Environment:

• Node.js Version: 17.4
• Redis Server Version: 6.2.6
• Node Redis Version: @node-redis/client: 1.0.2
• Platform: GNU/Linux

[ltwlf]

Duplicate of #1854
Seems to be fixed in #1856
Hope this will get released soon :)