Today I had got.
Linecast was stuck in infinite loop. Breaking.
UnityEngine.Debug:LogError(Object)
Pathfinding.NavmeshBase:Linecast(INavmesh, Vector3, Vector3, GraphNode, GraphHitInfo&, List1) (at Assets/AstarPathfindingProject/Generators/NavmeshBase.cs:1010) Pathfinding.NavmeshBase:Linecast(Vector3, Vector3, GraphNode, GraphHitInfo&, List
1) (at Assets/AstarPathfindingProject/Generators/NavmeshBase.cs:942)
I do not know how dangerous it is, still just decided to let you know it happened.