From 0d0b24e689b7f82f25f36a196cbf0c88cbb270ed Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=BE=90=E5=BF=97=E6=AF=85?= <xuzhiyi@youzan.com>
Date: Mon, 8 Apr 2019 10:35:40 +0800
Subject: [PATCH] fix class loader npe (#632)

---
 .../arthas/core/command/express/ClassLoaderClassResolver.java  | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/core/src/main/java/com/taobao/arthas/core/command/express/ClassLoaderClassResolver.java b/core/src/main/java/com/taobao/arthas/core/command/express/ClassLoaderClassResolver.java
index a1d3a4e84..6f39ebc3d 100644
--- a/core/src/main/java/com/taobao/arthas/core/command/express/ClassLoaderClassResolver.java
+++ b/core/src/main/java/com/taobao/arthas/core/command/express/ClassLoaderClassResolver.java
@@ -34,6 +34,9 @@ public class ClassLoaderClassResolver implements ClassResolver {
                     classes.put("java.lang." + className, result);
                 }
             }
+            if (result == null) {
+                return null;
+            }
             classes.put(className, result);
         }
         return result;