[rails5] ./spec/lib/gitlab/database/subquery_spec.rb is failing

https://gitlab.com/gitlab-org/gitlab-ce/-/jobs/100014876

 1) Gitlab::Database::Subquery.self_join allows you to delete_all rows with WHERE and LIMIT
     Failure/Error: described_class.self_join(Event.where('id < ?', events[5]).recent.limit(2)).delete_all

     ActiveRecord::StatementInvalid:
       PG::SyntaxError: ERROR:  syntax error at or near ")"
       LINE 1: ...HERE (id < 156) ORDER BY "events"."id" DESC LIMIT ) t2 ON "e...
                                                                    ^
       : DELETE FROM "events" WHERE "events"."id" IN (SELECT "events"."id" FROM "events" INNER JOIN (SELECT  "events".* FROM "events" WHERE (id < 156) ORDER BY "events"."id" DESC LIMIT ) t2 ON "events"."id" = t2."id")
     # ./spec/lib/gitlab/database/subquery_spec.rb:13:in `block (4 levels) in <top (required)>'
     # ./spec/lib/gitlab/database/subquery_spec.rb:12:in `block (3 levels) in <top (required)>'
     # ------------------
     # --- Caused by: ---
     # PG::SyntaxError:
     #   ERROR:  syntax error at or near ")"
     #   LINE 1: ...HERE (id < 156) ORDER BY "events"."id" DESC LIMIT ) t2 ON "e...
     #                                                                ^
     #   ./spec/lib/gitlab/database/subquery_spec.rb:13:in `block (4 levels) in <top (required)>'

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1433 examples, 1 failure, 5 pending

Failed examples:

rspec ./spec/lib/gitlab/database/subquery_spec.rb:9 # Gitlab::Database::Subquery.self_join allows you to delete_all rows with WHERE and LIMIT

reproducible locally with BUNDLE_GEMFILE=Gemfile.rails5 RAILS5=1 bundle exec rspec ./spec/lib/gitlab/database/subquery_spec.rb