Bug CineMachine NullReferenceException at PostPipelineStageCallback

Hello, currently I'm making a game with First Person View with Cinemachine with InputAction (new InputSystem) and currently whenever I compile a script I get a NullReferenceException error whenever I hover over the 'Stage' but the error disappears as soon as I start play until I edit a code. Is there possible solution to this?

Below is the code where I believe the error happens 'if (stage == CinemachineCore.Stage.Aim)'

Code (CSharp):

1. using UnityEngine;
2. using Cinemachine;
3.  
4. public class CineMachinePOVExtension : CinemachineExtension
5. {
6.     [SerializeField]
7.     private float horizontalSpeed = 10f;
8.     [SerializeField]
9.     private float clampAngle = 90f;
10.     private InputManager inputManager;
11.     private Vector3 startingRotation;
12.     protected override void Awake() {
13.         if (startingRotation == null){startingRotation = transform.localRotation.eulerAngles;}
14.         inputManager = InputManager.Instance;
15.         base.Awake();
16.     }
17.    
18.     protected override void PostPipelineStageCallback(CinemachineVirtualCameraBase vcam, CinemachineCore.Stage stage, ref CameraState state, float deltaTime)
19.     {
20.         if (vcam.Follow){
21.             if(stage == CinemachineCore.Stage.Aim){
22.                 Vector2 deltaInput = inputManager.GetMouseDelta();
23.                 startingRotation.x += deltaInput.x * horizontalSpeed * Time.deltaTime;
24.                 startingRotation.x = Mathf.Clamp(startingRotation.x, -clampAngle, clampAngle);
25.                 state.RawOrientation = Quaternion.Euler(0f, startingRotation.x, 0f);
26.             }
27.         }
28.     }
29. }

 

Same goes for any nullref:

How to fix a NullReferenceException error

https://forum.unity.com/threads/how-to-fix-a-nullreferenceexception-error.1230297/

Three steps to success:
- Identify what is null <-- any other action taken before this step is WASTED TIME
- Identify why it is null
- Fix that

In this case, since CM is calling you, just check for

stage

being null and don't use it, or perhaps immediately return.

There may even be a discussion in the documentation for CM about expecting this. Or it might have a bug.

Either way, same three steps always for nullref.

 

Thanks I figured it out the problem was that InputManager was not present prior to starting the game. so I had to null check on InputManager