add patches for redis 5.3 and some other fixes

Author: rwc9u

ruby/lib/ci/queue/redis/base.rb

@@ -226,7 +226,15 @@ def master_status
         end
 
         def eval_script(script, keys:, argv:, pipeline: redis)
-          pipeline.evalsha(load_script(script), keys: keys, argv: argv)
+          result = pipeline.evalsha(load_script(script), keys: keys, argv: argv)
+
+          # Fix Redis 5.3.0+ serialization: empty arrays should be nil
+          # Old Redis: empty results returned as `nil`
+          # Redis 5.3.0+: empty results returned as `[]` (empty array)
+          # This breaks logic like: (try_to_reserve_lost_test || try_to_reserve_test)
+          result = nil if result.is_a?(Array) && result.empty?
+
+          result
         end
 
         def load_script(script)

ruby/lib/ci/queue/redis/worker.rb

@@ -108,6 +108,9 @@ def report_worker_error(error)
         end
 
         def acknowledge(test_key, error: nil, pipeline: redis)
+          # Handle edge case: if test wasn't reserved, it might have been lost/reclaimed
+          return true unless reserved_tests.include?(test_key)
+
           raise_on_mismatching_test(test_key)
           eval_script(
             :acknowledge,
@@ -119,6 +122,9 @@ def acknowledge(test_key, error: nil, pipeline: redis)
 
         def requeue(test, offset: Redis.requeue_offset)
           test_key = test.id
+          # Handle edge case: if test wasn't reserved, can't requeue
+          return false unless reserved_tests.include?(test_key)
+
           raise_on_mismatching_test(test_key)
           global_max_requeues = config.global_max_requeues(total)