--- a/src/java.base/share/classes/java/lang/AbstractStringBuilder.java	Thu Mar 08 14:04:39 2018 +0800
+++ b/src/java.base/share/classes/java/lang/AbstractStringBuilder.java	Wed Mar 28 08:42:45 2018 -0700
@@ -69,10 +69,13 @@
      */
     int count;
 
+    private static final byte[] EMPTYVALUE = new byte[0];
+
     /**
      * This no-arg constructor is necessary for serialization of subclasses.
      */
     AbstractStringBuilder() {
+        value = EMPTYVALUE;
     }
 
     /**