diff --git a/Editor/Meta/GenericClass.cs b/Editor/Meta/GenericClass.cs
index d10c16e..746b7aa 100644
--- a/Editor/Meta/GenericClass.cs
+++ b/Editor/Meta/GenericClass.cs
@@ -1,6 +1,7 @@
 using dnlib.DotNet;
 using System.Collections.Generic;
 using System.Linq;
+using UnityEngine;
 
 namespace HybridCLR.Editor.Meta
 {
@@ -61,6 +62,11 @@ namespace HybridCLR.Editor.Meta
                 return null;
             }
             TypeDef def = type.ResolveTypeDef();
+            if (def == null)
+            {
+                Debug.LogError($"type:{type} ResolveTypeDef() == null");
+                return null;
+            }
             var klassInst = ctx != null ? sig.GenericArguments.Select(ga => MetaUtil.Inflate(ga, ctx)).ToList() : sig.GenericArguments.ToList();
             return new GenericClass(def, klassInst);
         }
diff --git a/Editor/Meta/GenericMethod.cs b/Editor/Meta/GenericMethod.cs
index 9989209..a725db7 100644
--- a/Editor/Meta/GenericMethod.cs
+++ b/Editor/Meta/GenericMethod.cs
@@ -2,6 +2,7 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using UnityEngine;
 
 namespace HybridCLR.Editor.Meta
 {
@@ -87,6 +88,7 @@ namespace HybridCLR.Editor.Meta
             methodDef = method.ResolveMethodDef();
             if (methodDef == null)
             {
+                Debug.LogError($"method:{method} ResolveMethodDef() == null");
                 return null;
             }
             if (method is MethodSpec methodSpec)