Fixed exception.

Author: genaray

src/Arch/Core/ComponentRegistry.cs

@@ -408,7 +408,6 @@ public static ComponentType GetComponentType(Type type)
     /// </summary>
     /// <param name="obj">The <see cref="ComponentType"/> array.</param>
     /// <returns>A unique hashcode for the contained elements, regardless of their order.</returns>
-
     public static int GetHashCode(Span<ComponentType> obj)
     {
           // Search for the highest id to determine how much uints we need for the stack.
@@ -440,7 +439,6 @@ public static int GetHashCode(Span<ComponentType> obj)
     /// </summary>
     /// <param name="span">The <see cref="Span{T}"/>.</param>
     /// <returns>A unique hashcode for the contained elements.</returns>
-
     public static int GetHashCode(Span<uint> span)
     {
         var hashCode = new HashCode();

src/Arch/Core/EntityInfo.cs

@@ -100,7 +100,7 @@ internal void Move(Archetype archetype, Slot slot)
     /// <returns>True or false.</returns>
     public bool Equals(EntityData other)
     {
-        return Version == other.Version && Archetype.Equals(other.Archetype) && Slot.Equals(other.Slot);
+        return Version == other.Version && Archetype != null && Archetype.Equals(other.Archetype) && Slot.Equals(other.Slot);
     }
 
     /// <summary>