Added simple dependency check to PoolGroupAsset.

Author: BluePixelDev

Runtime/PoolAsset.cs

@@ -44,5 +44,7 @@ private void ApplyAsset(RefPooler pooler)
             pooler.MaxSize = maxSize;
             pooler.ReuseObjects = reuseObjects;
         }
+
+        public override bool IsContainedIn(RefResource resource) => resource == this;
     }
 }

Runtime/PoolGroupAsset.cs

@@ -36,6 +36,13 @@ private void OnValidate()
                     Debug.LogWarning("[PoolGroupAsset] Cannot assign itself as pool entry");
                     continue;
                 }
+
+                if (poolRes.IsContainedIn(this))
+                {
+                    pools.RemoveAt(i);
+                    Debug.LogWarning("[PoolGroupAsset] Cyclic dependency detected, removing!");
+                    continue;
+                }
             }
         }
 
@@ -74,5 +81,18 @@ public override RefComponent CreateComponent()
             }
             return groupComponent;
         }
+
+        public override bool IsContainedIn(RefResource resource)
+        {
+            foreach (var poolAsset in pools)
+            {
+                if (poolAsset == resource) return true;
+                if (poolAsset.IsContainedIn(resource))
+                {
+                    return true;
+                }
+            }
+            return false;
+        }
     }
 }

Runtime/RefResource.cs

@@ -6,6 +6,8 @@ public abstract class RefResource : ScriptableObject
     {
         public abstract void Prepare();
         public abstract RefItem Get();
+
+        public abstract bool IsContainedIn(RefResource resource);
         public abstract RefComponent CreateComponent();
     }
 }