--- a/src/java.base/share/classes/java/lang/StringBuffer.java	Wed Feb 06 00:20:37 2019 +0100
+++ b/src/java.base/share/classes/java/lang/StringBuffer.java	Tue Feb 05 17:05:40 2019 -0800
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1994, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1994, 2019, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -148,7 +148,7 @@
      */
     @HotSpotIntrinsicCandidate
     public StringBuffer(String str) {
-        super(str.length() + 16);
+        super(str.coder(), str.length(), 16);
         append(str);
     }
 
@@ -166,7 +166,7 @@
      * @since 1.5
      */
     public StringBuffer(CharSequence seq) {
-        this(seq.length() + 16);
+        super(String.LATIN1, seq.length(), 16);
         append(seq);
     }