--- old/src/java.base/share/classes/java/lang/StringBuilder.java	2019-04-10 18:51:32.265300300 -0400
+++ new/src/java.base/share/classes/java/lang/StringBuilder.java	2019-04-10 18:51:31.343208100 -0400
@@ -121,7 +121,8 @@
      */
     @HotSpotIntrinsicCandidate
     public StringBuilder(String str) {
-        super(str);
+        super(str.coder(), str.length(), 16);
+        append(str);
     }
 
     /**
@@ -133,7 +134,8 @@
      * @param      seq   the sequence to copy.
      */
     public StringBuilder(CharSequence seq) {
-        super(seq);
+        super(String.LATIN1, seq.length(), 16);
+        append(seq);
     }
 
     /**