Workaround for pull requests stuck in conflict checking state

See comment and upstream issue go-gitea#23050 for details

Author: brechtvl

modules/queue/unique_queue_disk_channel.go

@@ -173,6 +173,21 @@ func (q *PersistableChannelUniqueQueue) Has(data Data) (bool, error) {
 	if err != nil || has {
 		return has, err
 	}
+
+	// BLENDER: workaround for problem where on ungraceful shutdown, the persistent
+	// queue on disk contains PRs to be checked for conflicts. On restart these will
+	// be laoded into q.internal, but seemingly not start any work.
+	//
+	// At the same time InitializePullRequests will also add any PRs waiting for
+	// conflict checking to q.channelQueue, which does start work but does not write
+	// out its status because this Has() check returns true.
+	//
+	// Workaround is to just not check the persistent queue since it seems unnecessary
+	// for this particular case.
+	if q.Name() == "pr_patch_checker" {
+		return false, nil
+	}
+
 	q.lock.Lock()
 	defer q.lock.Unlock()
 	if q.internal == nil {