Hello,

i'm using ST4 (4.0.8) and if i want to clone a ST two times; the second clone, st3, may cause an ArrayIndexOutOfBoundsException when i call the method add() on it.

        ST st1 = new ST("$key$");
        st1.add("toto", "tata");
        ST st2 = new ST(st1);
        st2.add("key", "value2");
        ST st3 = new ST(st1);
        st3.add("key", "value3");

Exception :

java.lang.ArrayIndexOutOfBoundsException: 1
    at org.stringtemplate.v4.ST.add(ST.java:246)
        at com.###(###.java:85)

The clone operation doesn't allow add operations ?