bug fixed

src/main/java/com/alibaba/fastjson/JSONWriter.java

@@ -16,14 +16,18 @@ public class JSONWriter {
     private Context         context;
 
     public static enum State {
-        None, BeginObject, PropertyKey, PropertyValue, BeginArray, ArrayValue
+        BeginObject, //
+        PropertyKey, //
+        PropertyValue, //
+        BeginArray, //
+        ArrayValue
     }
 
     public static class Context {
 
         private final Context parent;
 
-        private State         state = State.None;
+        private State         state;
 
         public Context(Context parent, State state){
             this.parent = parent;

src/main/java/com/alibaba/fastjson/parser/DefaultJSONParser.java

@@ -279,7 +279,7 @@ public class DefaultJSONParser extends AbstractJSONParser {
 
                     this.setResolveStatus(TypeNameRedirect);
 
-                    if (this.context != null) {
+                    if (this.context != null && fieldName instanceof String) {
                         this.popContext();
                     }
 

src/test/java/com/alibaba/json/bvt/bug/Bug_for_cduym.java

@@ -0,0 +1,101 @@
+package com.alibaba.json.bvt.bug;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import junit.framework.Assert;
+import junit.framework.TestCase;
+
+import com.alibaba.fastjson.JSON;
+import com.alibaba.fastjson.serializer.SerializerFeature;
+
+public class Bug_for_cduym extends TestCase {
+
+    @SuppressWarnings("rawtypes")
+    public void test0() {
+
+        List<A> as = new ArrayList<A>();
+
+        A a1 = new A();
+        a1.setA(1000);
+        a1.setB(2000l);
+        a1.setC("xxx");
+
+        as.add(a1);
+        as.add(a1);
+
+        String text = JSON.toJSONString(as, SerializerFeature.WriteClassName);
+        List<?> target = (List) JSON.parseObject(text, Object.class);
+        
+        Assert.assertSame(target.get(0), target.get(1));
+    }
+    
+    public void test1() {
+        
+        List<A> as = new ArrayList<A>();
+        
+        A a1 = new A();
+        a1.setA(1000);
+        a1.setB(2000l);
+        a1.setC("xxx");
+        
+        as.add(a1);
+        as.add(a1);
+        
+        Demo o = new Demo();
+        o.setAs(as);
+        
+        String text = JSON.toJSONString(o, SerializerFeature.WriteClassName);
+        Demo target = (Demo) JSON.parseObject(text, Object.class);
+        
+        Assert.assertSame(((List)target.getAs()).get(0), ((List)target.getAs()).get(1));
+    }
+    
+
+    public static class Demo {
+
+        private Object as;
+
+        public Object getAs() {
+            return as;
+        }
+
+        public void setAs(Object as) {
+            this.as = as;
+        }
+
+    }
+
+    private static class A {
+
+        private Integer a;
+        private Long    b;
+
+        private String  c;
+
+        public Integer getA() {
+            return a;
+        }
+
+        public void setA(Integer a) {
+            this.a = a;
+        }
+
+        public Long getB() {
+            return b;
+        }
+
+        public void setB(Long b) {
+            this.b = b;
+        }
+
+        public String getC() {
+            return c;
+        }
+
+        public void setC(String c) {
+            this.c = c;
+        }
+
+    }
+}