Bug Crashing when updating two bone ik target positions

Hi all, not sure if there's already an answer to this issue but I've been searching for a few hours and can't find anything.

I have a third-person player character, and both arms have the two-bone IK constraint on them. I have their target transform constantly following game objects that are attached to the weapon. However, Unity seems to crash when I play test. It seems to only be when the player is aiming in or out so I've assumed it's something to do with updating the positions of the targets as I know they use jobs behind the scenes.

I've added my code below that is responsible for the aiming in and out. As you can see, I tried fixing it by adding an aim timer but it was no use.

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using Cinemachine;
5. using StarterAssets;
6.  
7. public class ThirdPersonShooterController : MonoBehaviour
8. {
9.     [SerializeField]CinemachineVirtualCamera aimVirtualCamera;
10.     [SerializeField]float normalSensitivity;
11.     [SerializeField]float aimSensitivity;
12.     [SerializeField]GameObject crosshair;
13.     [SerializeField]LayerMask aimColliderLayerMask;
14.     [SerializeField]Transform debugTransform;
15.     [SerializeField]GameObject projectile;
16.     [SerializeField]Weapon currentWeapon;
17.     [SerializeField]Transform weaponHolsteredPosition;
18.     [SerializeField]Transform weaponDrawnPosition;
19.     [SerializeField]IK_Target iK_Targets;
20.     [SerializeField]Transform leftHandIK_Hint;
21.     [SerializeField]Transform rightHandIK_Hint;
22.  
23.     StarterAssetsInputs starterAssetsInputs;
24.     ThirdPersonController thirdPersonController;
25.     bool lastAimState = false;
26.     float aimTimer;
27.     float minAimTime = 0.1f;
28.  
29.     public void SetCurrentWeapon(Weapon _weapon)
30.     {
31.         currentWeapon.transform.parent = null;
32.         currentWeapon = _weapon;
33.     }
34.  
35.     void Awake()
36.     {
37.         thirdPersonController = GetComponent<ThirdPersonController>();
38.         starterAssetsInputs = GetComponent<StarterAssetsInputs>();  
39.     }
40.  
41.     void Start()
42.     {
43.         SetHolsterPositions();  
44.     }
45.  
46.     void Update()
47.     {
48.         aimTimer += Time.deltaTime;
49.         Debug.Log(aimTimer);
50.  
51.         Vector3 mouseWorldPosition = Vector3.zero;
52.  
53.         Vector2 screenCenterPoint = new Vector2(Screen.width / 2f, Screen.height / 2f);
54.         Ray ray = Camera.main.ScreenPointToRay(screenCenterPoint);
55.         Transform hitTransform = null;
56.         if(Physics.Raycast(ray, out RaycastHit raycastHit, 999f, aimColliderLayerMask))
57.         {
58.             debugTransform.position = raycastHit.point;
59.             mouseWorldPosition = raycastHit.point;
60.             hitTransform = raycastHit.transform;
61.         }
62.  
63.         SetIK_Values();
64.  
65.         if(starterAssetsInputs.aim)
66.         {
67.             Vector3 worldAimTarget = mouseWorldPosition;
68.             worldAimTarget.y = transform.position.y;
69.             Vector3 aimDirection = (worldAimTarget - transform.position).normalized;
70.  
71.             transform.forward = Vector3.Lerp(transform.forward, aimDirection, Time.deltaTime * 20f);
72.  
73.             if(starterAssetsInputs.aim != lastAimState)
74.             {
75.                 if(aimTimer > minAimTime)
76.                 {
77.                     aimVirtualCamera.gameObject.SetActive(true);
78.                     thirdPersonController.SetSensitivity(aimSensitivity);
79.                     thirdPersonController.SetRotateOnMove(false);
80.                     thirdPersonController.SetCanSprint(false);
81.                     crosshair.SetActive(true);
82.  
83.                     SetAimPositions();
84.  
85.                     aimTimer = 0f;
86.                 }
87.             }
88.         }
89.         else
90.         {
91.  
92.             if(starterAssetsInputs.aim != lastAimState)
93.             {
94.                 if(aimTimer > minAimTime)
95.                 {
96.                     aimVirtualCamera.gameObject.SetActive(false);
97.                     thirdPersonController.SetSensitivity(normalSensitivity);
98.                     thirdPersonController.SetRotateOnMove(true);
99.                     thirdPersonController.SetCanSprint(true);
100.                     crosshair.SetActive(false);
101.  
102.                     SetHolsterPositions();
103.  
104.                     aimTimer = 0f;
105.                 }
106.             }
107.         }
108.  
109.         if(starterAssetsInputs.shoot)
110.         {
111.             if(hitTransform != null)
112.             {
113.                 if(hitTransform.GetComponent<BulletTarget>() != null)
114.                 {
115.                     Debug.Log("Hit!");
116.                 }
117.                 else
118.                 {
119.                     Debug.Log("Miss!");
120.                 }
121.             }
122.  
123.             Vector3 aimDir = (mouseWorldPosition - currentWeapon.GetBulletSpawnPosition().position).normalized;
124.             GameObject newProjectile = Instantiate(projectile, currentWeapon.GetBulletSpawnPosition().position, Quaternion.LookRotation(aimDir, Vector3.up));
125.             newProjectile.GetComponent<BulletRaycastProjectile>().Setup(raycastHit.point);
126.  
127.             starterAssetsInputs.shoot = false;
128.         }
129.     }
130.  
131.     void SetIK_Values()
132.     {
133.         iK_Targets.GetLeftHandIK_Target().position = currentWeapon.GetIK_Targets().GetLeftHandIK_Target().position;
134.         iK_Targets.GetLeftHandIK_Target().rotation = currentWeapon.GetIK_Targets().GetLeftHandIK_Target().rotation;
135.  
136.         iK_Targets.GetRightHandIK_Target().position = currentWeapon.GetIK_Targets().GetRightHandIK_Target().position;
137.         iK_Targets.GetRightHandIK_Target().rotation = currentWeapon.GetIK_Targets().GetRightHandIK_Target().rotation;
138.     }
139.  
140.     void SetAimPositions()
141.     {
142.         while(currentWeapon.transform.position != weaponDrawnPosition.position && currentWeapon.transform.forward != weaponDrawnPosition.forward)
143.         {
144.             currentWeapon.transform.position = Vector3.Lerp(currentWeapon.transform.position, weaponDrawnPosition.position, Time.deltaTime * 20f);
145.             currentWeapon.transform.forward = Vector3.Lerp(currentWeapon.transform.forward, weaponDrawnPosition.forward, Time.deltaTime * 20f);
146.         }
147.         lastAimState = starterAssetsInputs.aim;
148.  
149.         currentWeapon.transform.parent = weaponDrawnPosition;
150.  
151.         leftHandIK_Hint.position = currentWeapon.GetIK_Hints().GetLeftHandIK_AimHint().position;
152.         leftHandIK_Hint.localRotation = currentWeapon.GetIK_Hints().GetLeftHandIK_AimHint().localRotation;
153.  
154.         rightHandIK_Hint.position = currentWeapon.GetIK_Hints().GetRightHandIK_AimHint().position;
155.         rightHandIK_Hint.localRotation = currentWeapon.GetIK_Hints().GetRightHandIK_AimHint().localRotation;
156.     }
157.  
158.     void SetHolsterPositions()
159.     {
160.         while(currentWeapon.transform.position != weaponHolsteredPosition.position + currentWeapon.GetHolsterPositionOffset() &&
161.         currentWeapon.transform.forward != weaponHolsteredPosition.forward + currentWeapon.GetHolsterRotationOffset())
162.         {
163.             currentWeapon.transform.position = Vector3.Lerp(currentWeapon.transform.position, weaponHolsteredPosition.position + currentWeapon.GetHolsterPositionOffset(), Time.deltaTime * 20f);
164.             currentWeapon.transform.forward = Vector3.Lerp(currentWeapon.transform.forward, weaponHolsteredPosition.forward + currentWeapon.GetHolsterRotationOffset(), Time.deltaTime * 20f);
165.         }
166.  
167.         lastAimState = starterAssetsInputs.aim;
168.  
169.         currentWeapon.transform.parent = weaponHolsteredPosition;
170.         currentWeapon.transform.localPosition += currentWeapon.GetHolsterPositionOffset();
171.         currentWeapon.transform.forward += currentWeapon.GetHolsterRotationOffset();
172.  
173.         leftHandIK_Hint.position = currentWeapon.GetIK_Hints().GetLeftHandIK_HolsterHint().position;
174.         leftHandIK_Hint.localRotation = currentWeapon.GetIK_Hints().GetLeftHandIK_HolsterHint().localRotation;
175.  
176.         rightHandIK_Hint.position = currentWeapon.GetIK_Hints().GetRightHandIK_HolsterHint().position;
177.         rightHandIK_Hint.localRotation = currentWeapon.GetIK_Hints().GetRightHandIK_HolsterHint().localRotation;
178.     }
179. }

 

Hey, I'm currently encountering the same issue, have you found any fixes / workarounds?