gcc/libjava/testsuite/libjava.lang/PR12350.java

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public class PR12350
{
static public void main (String[] ignored) throws Throwable
{
StringBuffer b = new StringBuffer ("Good string. More than 16 chars.");
// Should cause sharing.
String s = b.toString();
// Take a char by char unshared copy of s.
String t = new String (s.toCharArray());
b.substring (0, 4); // BUG: Clears shared flag.
b.replace (0, 4, "Bad "); // Modifies shared data.
System.out.println (s);
assert s.equals (t);
}
}