hlsf error is solving

StgSharp.Common/HighPerformance/Memory/HLSFAllocator.Debug.cs

@@ -33,6 +33,14 @@ using System.Threading.Tasks;
 
 namespace StgSharp.HighPerformance.Memory
 {
+    public sealed class HLSFPositionChainBreakException : Exception
+    {
+
+        public HLSFPositionChainBreakException()
+            : base("Position chain of an HLSF allocator is broken") { }
+
+    }
+
     public unsafe partial class HybridLayerSegregatedFitAllocator
     {
 
@@ -72,7 +80,7 @@ namespace StgSharp.HighPerformance.Memory
         private static string EntryToString(Entry* e)
         {
             BucketNode* b = (BucketNode*)e->Position;
-            return $"{(ulong)e->PreviousNear}<-- Position{(ulong)e} Bucket:{{{e->Position},{e->Level},{e->Size}}} -->{(ulong)e->NextNear}";
+            return $"{(ulong)e->PreviousNear}<-- Position{(ulong)e} Bucket:{{{(ulong)e->Position},{e->Level},{e->Size}}} -->{(ulong)e->NextNear}";
         }
 
     }