Symfony version(s) affected

7.1.2

Description

I'm trying to flush doctrine metadata using Redis adapter with Valkey 8.0.
The RedisTrait sends the following query to Valkey: SCAN NULL on the first loop iteration, which leads to error ERR invalid cursor.

Shouldn't the cursor variable initialized to value 0?
I've patched the file with $cursor = 0; instead, and bin/console doctrine:cache:clear-metadata works as expected.

How to reproduce

I'm using the following configuration:

doctrine:
    orm:
        metadata_cache_driver:
            type: pool
            pool: doctrine_redis

framework:
    cache:
        pools:
            doctrine_redis:
                adapter: cache.adapter.redis
                provider: snc_redis.doctrine_metadata_cache

snc_redis:
    clients:
        doctrine_metadata_cache:
            type: predis
            alias: doctrine_metadata_cache
            dsn: "%env(REDIS_URL)%/3"
            options:
                connection_timeout: 10
                read_write_timeout: 30

And run bin/console doctrine:cache:clear-metadata to get the error.

You can also use directly valkey-cli SCAN NULL

Possible Solution

Initialize the cursor variable with 0.

Additional Context

No response