"save" produce PHP Notice if there is not free memory in Redis

[kandy]

Steps:

• I configure limited size of redis (40MB)
• Redis php extension is not installed
• I create a script and run

<?php
       $cache = new Cm_Cache_Backend_Redis([ ... ]);
       while (true) {
           $cache->save('data', "my_test_data" . $i++, ['tag1', 'tag2', 'tag3_'.$i ]);
       }

WIG:
PHP Notice: Undefined offset: 5 in /app/vendor/colinmollenhour/credis/Client.php on line 963
WIE:
save will return false or exception

[colinmollenhour]

On master line 963 is a comment.. Are you using the latest version?

https://github.com/colinmollenhour/credis/blob/master/Client.php#L963

[kandy]

I test on version 1.10.6 of colinmollenhour/cache-backend-redis package
On master, it will be https://github.com/colinmollenhour/credis/blob/master/Client.php#L991 line

[colinmollenhour]

Thanks. The answer is not obvious to me so this would require further investigation which I don't know when I'd be able to do. I'd be happy to review a PR if you can find the issue, or if you can at least provide a screenshot of a debugger at this step I might be able to help more.

[Xon]

What version of Redis?

[kandy]

@Xon
redis_version:5.0.7