scan_each getting NPE

[dmitchell]

NoMethodError: undefined method `each' for nil:NilClass
    /usr/local/bundle/gems/redis-4.1.3/lib/redis.rb:2668:in `block in scan_each'
    /usr/local/bundle/gems/redis-4.1.3/lib/redis.rb:2666:in `loop'
    /usr/local/bundle/gems/redis-4.1.3/lib/redis.rb:2666:in `scan_each'
    test/common_test_methods.rb:539:in `block in purge_tasks'
    lib/v2/updates/redis_updates_processor.rb:15:in `block in with_redis'
    /usr/local/bundle/gems/redis-4.1.3/lib/redis.rb:2415:in `block in pipelined'
    /usr/local/bundle/gems/redis-4.1.3/lib/redis.rb:52:in `block in synchronize'
    /usr/local/lib/ruby/2.3.0/monitor.rb:214:in `mon_synchronize'
    /usr/local/bundle/gems/redis-4.1.3/lib/redis.rb:52:in `synchronize'
    /usr/local/bundle/gems/redis-4.1.3/lib/redis.rb:2411:in `pipelined'
    lib/v2/updates/redis_updates_processor.rb:15:in `with_redis'
    test/common_test_methods.rb:525:in `purge_tasks'
    test/unit/client_remarketing_campaign_factory_test.rb:93:in `block (2 levels) in <class:ClientRemarketingCampaignFactoryTest>'
    test/common_test_methods.rb:166:in `as_dealer_sem'
    test/unit/client_remarketing_campaign_factory_test.rb:44:in `block in <class:ClientRemarketingCampaignFactoryTest>'

# test/common_test_methods.rb:539
          redis.scan_each(match: "#{account.id}:*") do |key|
            redis.del(key)
          end

Looks like a dupe of https://github.com/redis/redis-rb/issues/624 but that closed 3.5y ago and I assume is in 4.1.3.

[byroot]

Could you provide some context? A repro script would be ideal, but at the very least a non truncated backtrace, and the command and parameters?

[fatkodima]

@dmitchell Which version of redis are you using? Are you using fakeredis (as mentioned in the linked issue)?

[byroot]

Closing as non actionable