"Screen position out of view frustum" error on startup

Hello,

I started a new project in unity recently. For now, it only has a camera, a script (attached to the camera), and two cubes. Yet I already have the infamous "Screen position out of view frustum" error EVERY time I start unity. To be more precise, here's the exact error message

Screen position out of view frustum (screen pos 0.000000, 0.000000, 100.000000) (Camera rect 0 0 0 0) UnityEngine.Camera:ScreenToWorldPoint(Vector3) cameraGizmo:OnDrawGizmos() (at Assets/RMAssets/Scripts/Misc/cameraGizmo.cs:17) UnityEditor.DockArea:OnGUI()

I've been searching all around for explanation. But all I could found was "meh it's an editor bug, just don't mind it. They've never been able to reproduce it".

So my questions are: Does this bug has been tracked down yet? If not, should I / How do I give a copy of my project to unity devs?

By the way, here's the script file attached to the camera, I only use it to print the camera field of view (not the full frustrum because I'm working on a 2D game):

 using UnityEngine;
 using System.Collections;
  
 public class cameraGizmo : MonoBehaviour
 {
     Camera cam;
  
     void Start()
     {
         Gizmos.color = Color.white;
     }
  
     void OnDrawGizmos()
     {
         Camera cam = this.camera;
  
         Vector3 blPoint = cam.ScreenToWorldPoint(new Vector3(0, 0, cam.farClipPlane));
         Vector3 brPoint = cam.ScreenToWorldPoint(new Vector3(cam.pixelWidth, 0, cam.farClipPlane));
         Vector3 tlPoint = cam.ScreenToWorldPoint(new Vector3(0, cam.pixelHeight, cam.farClipPlane));
         Vector3 trPoint = cam.ScreenToWorldPoint(new Vector3(cam.pixelWidth, cam.pixelHeight, cam.farClipPlane));
  
         Gizmos.DrawLine(tlPoint, trPoint);
         Gizmos.DrawLine(trPoint, brPoint);
         Gizmos.DrawLine(brPoint, blPoint);
         Gizmos.DrawLine(blPoint, tlPoint);
     }
  
     void OnDrawGizmosSelected()
     {
         Gizmos.color = Color.red;
         OnDrawGizmos();
     }
 }

Thanks for reading. Any help would be appreciated.