"Discovering subsystems..." output

Just started a new project with Unity 2019.2b2 and the latest ARFoundation package, and I get this upon start on the device:

Code (csharp):

1.  
2. [XR] Discovering subsystems at path /var/containers/Bundle/Application/977288A1-27DC-467C-9953-CE4B7B02A6C3/la-trobe-geolocation-prototype.app/Data/UnitySubsystems
3.  
4. [XR] No descriptors matched for  examples in UnitySubsystems/UnityARKit/UnitySubsystemsManifest.json.
5.  
6. [XR] 1 'inputs' descriptors matched in UnitySubsystems/UnityARKit/UnitySubsystemsManifest.json
7.  
8. [XR] No descriptors matched for  cameras in UnitySubsystems/UnityARKit/UnitySubsystemsManifest.json.
9.  
10. [XR] No descriptors matched for  displays in UnitySubsystems/UnityARKit/UnitySubsystemsManifest.json.
11.  
12. [XR] No descriptors matched for  depths in UnitySubsystems/UnityARKit/UnitySubsystemsManifest.json.
13.  
14. [XR] No descriptors matched for  meshings in UnitySubsystems/UnityARKit/UnitySubsystemsManifest.json.
15.  
16. [XR] No descriptors matched for  planes in UnitySubsystems/UnityARKit/UnitySubsystemsManifest.json.
17.  
18. [XR] No descriptors matched for  raycasts in UnitySubsystems/UnityARKit/UnitySubsystemsManifest.json.
19.  
20. [XR] No descriptors matched for  referencePoints in UnitySubsystems/UnityARKit/UnitySubsystemsManifest.json.
21.  
22. [XR] No descriptors matched for  sessions in UnitySubsystems/UnityARKit/UnitySubsystemsManifest.json.
23.  
24. [XR] No descriptors matched for  experience in UnitySubsystems/UnityARKit/UnitySubsystemsManifest.json.
25.  
26. [XR] No descriptors matched for  gestures in UnitySubsystems/UnityARKit/UnitySubsystemsManifest.json.
27.  

What's causing this?

 

That output is coming from the SubsystemManager. It's normal and expected to see this in a development player. You should not see it in a non-development player.

 

I'm seeing this in a release player built-in 2019.3.7f1. Is this an issue?