Destroying ActiveRecord objects results in SystemStackError when using newrelic_rpm

[kommen]

When having newrelic_rpm (version 3.15.0.314) as a dependency in a rails app together with postamt, destroying ActiveRecord records fails with an SystemStackError: stack level too deep.

The last stack frames look like:

from /Users/kommen/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/activerecord-4.2.6/lib/active_record/relation.rb:304:in `ensure in scoping'
    from /Users/kommen/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/activerecord-4.2.6/lib/active_record/relation.rb:304:in `scoping'
    from /Users/kommen/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/activerecord-4.2.6/lib/active_record/relation/delegation.rb:70:in `name'
    from /Users/kommen/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/newrelic_rpm-3.15.0.314/lib/new_relic/agent/instrumentation/active_record_helper.rb:53:in `delete_all'
    from /Users/kommen/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/postamt-0.9.7/lib/postamt.rb:121:in `block in delete_all'
    from /Users/kommen/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/postamt-0.9.7/lib/postamt.rb:19:in `on'
    from /Users/kommen/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/postamt-0.9.7/lib/postamt.rb:121:in `delete_all'
    from /Users/kommen/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/newrelic_rpm-3.15.0.314/lib/new_relic/agent/instrumentation/active_record_helper.rb:54:in `block in delete_all'
    from /Users/kommen/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/newrelic_rpm-3.15.0.314/lib/new_relic/agent.rb:574:in `with_database_metric_name'
    from /Users/kommen/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/newrelic_rpm-3.15.0.314/lib/new_relic/agent/instrumentation/active_record_helper.rb:53:in `delete_all'
    from /Users/kommen/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/postamt-0.9.7/lib/postamt.rb:121:in `block in delete_all'
    from /Users/kommen/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/postamt-0.9.7/lib/postamt.rb:19:in `on'
    from /Users/kommen/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/postamt-0.9.7/lib/postamt.rb:121:in `delete_all'
    from /Users/kommen/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/newrelic_rpm-3.15.0.314/lib/new_relic/agent/instrumentation/active_record_helper.rb:54:in `block in delete_all'
    from /Users/kommen/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/newrelic_rpm-3.15.0.314/lib/new_relic/agent.rb:574:in `with_database_metric_name'
    from /Users/kommen/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/newrelic_rpm-3.15.0.314/lib/new_relic/agent/instrumentation/active_record_helper.rb:53:in `delete_all'

The issue was not present with older newrelic_rpm versions (e.g. 3.9.0.229). This commit looks like it could be the cause: newrelic/newrelic-ruby-agent@9c267ff